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Adenoid
Tonsilla pharyngea
A mass of lymphoid tissue at the back of the nasal cavity that helps catch inhaled germs in childhood.
Below are body parts that contain the letter A anywhere in the name. Each of the 83 body parts below opens to a full profile.
Table of contents
List of Body Parts That Contain A
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Adrenal Gland
Glandula suprarenalis
A small endocrine gland on top of each kidney that produces stress hormones, mineralocorticoids, and small amounts of sex hormones.
3
Alveoli
Alveoli pulmonis
Microscopic air sacs at the end of the bronchioles where gas exchange between air and blood takes place.
4
Aorta
Aorta
The largest artery in the body, carrying oxygen-rich blood from the heart's left ventricle to the rest of the body.
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Aortic Bulb
Bulbus aortae
The dilated base of the ascending aorta just above the aortic valve, containing the openings of the coronary arteries.
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Appendix
Appendix vermiformis
A small finger-shaped pouch attached to the cecum at the start of the large intestine.
7
Arteries
Thick-walled blood vessels that carry oxygenated blood from the heart to tissues throughout the body.
8
Atrium
Atrium cordis
Either of the two upper chambers of the heart that receive blood returning from circulation.
9
Bladder
Vesica
A muscular reservoir that stores fluid before release, most commonly referring to the urinary bladder.
10
Brain
Encephalon
The central organ of the nervous system, responsible for thought, sensation, movement, and the control of every other body system.
11
Calf
Sura
The fleshy posterior part of the lower leg, made up mostly of the gastrocnemius and soleus muscles.
12
Capillaries
Microscopic blood vessels where the exchange of oxygen, nutrients, and waste between blood and tissues occurs.
13
Carotid Artery
Arteria carotis
A pair of major arteries in the neck that supply blood to the brain, face, and neck tissues.
14
Carpals
Ossa carpi
Eight small bones arranged in two rows that form the bony framework of the wrist.
15
Clavicle
Clavicula
The collarbone, a horizontal S-shaped bone connecting the arm to the rest of the skeleton.
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Diaphragm
Diaphragma
A dome-shaped sheet of muscle separating the thoracic and abdominal cavities and serving as the main muscle of breathing.
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Fibula
Fibula
The slender lateral bone of the lower leg that runs alongside the tibia and forms the outer ankle bump.
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Gallbladder
Vesica biliaris
A small pear-shaped organ that stores and concentrates bile produced by the liver.
22
Gluteus Maximus
Musculus gluteus maximus
The largest and most superficial muscle of the buttock, responsible for hip extension and a powerful push-off when climbing or running.
23
Hair Bulb
Bulbus pili
The rounded base of a hair follicle, where new hair cells are produced by rapidly dividing matrix cells.
24
Heart
Cor
A muscular pump in the thoracic cavity that circulates blood through the body via the cardiovascular system.
25
Hippocampus
Hippocampus
A seahorse-shaped brain structure deep in the temporal lobe that is essential for forming new memories.
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Hypothalamus
Hypothalamus
A small region at the base of the brain that controls hormone release, body temperature, hunger, and many basic drives.
27
Iliac Artery
Arteria iliaca
A large artery in the pelvis that supplies blood to the lower limb and pelvic organs.
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Iliac Wing
Ala ossis ilii
The broad flat upper portion of the ilium that flares outward to form the side of the pelvis.
29
Jaw
Mandibula
The bony framework of the lower face that holds the teeth and articulates with the skull at the temporomandibular joint.
30
Jugular Foramen
Foramen jugulare
A large opening at the base of the skull through which several cranial nerves and the internal jugular vein exit the cranial cavity.
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Jugular Vein
Vena jugularis
A pair of large veins in the neck that drain blood from the head and brain back toward the heart.
32
Kneecap
Patella
A small triangular bone embedded in the quadriceps tendon at the front of the knee, also called the patella.
33
Lacrimal Sac
Saccus lacrimalis
A small pouch at the inner corner of the eye that collects tears before they drain into the nose.
34
Large Intestine
Intestinum crassum
The final section of the digestive tract that absorbs water and electrolytes and forms feces from undigested material.
35
Larynx
Larynx
The voice box, a cartilage-framed organ in the neck that produces sound and protects the lower airway.
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Metacarpals
Ossa metacarpi
Five long bones in the palm of the hand that connect the wrist to the fingers.
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Nasal Cavity
Cavitas nasi
The hollow space behind the nose where inhaled air is filtered, warmed, and humidified before reaching the lungs.
39
Occipital Bone
Os occipitale
The single bone at the back and base of the skull that surrounds the foramen magnum where the spinal cord exits.
40
Olfactory Bulb
Bulbus olfactorius
A small forebrain structure at the front of the brain that processes incoming signals about smell.
41
Ovary
Ovarium
A paired female reproductive gland that produces eggs and secretes the hormones estrogen and progesterone.
42
Pancreas
Pancreas
An elongated gland behind the stomach that produces digestive enzymes and hormones regulating blood sugar.
43
Patella
Patella
The kneecap, a triangular sesamoid bone embedded in the tendon of the quadriceps in front of the knee.
44
Pericardial Sac
Pericardium
A tough double-layered sac that surrounds the heart, anchoring it and reducing friction during each beat.
45
Phalanges
Phalanges
The bones of the fingers and toes, arranged in three segments per digit except the thumb and great toe.
46
Pharynx
Pharynx
The throat, a muscular tube that carries air to the larynx and food to the esophagus.
47
Pineal Gland
Glandula pinealis
A small endocrine gland deep in the brain that secretes melatonin and helps regulate the sleep-wake cycle.
48
Pulmonary Artery
Arteria pulmonalis
A short, large vessel that carries deoxygenated blood from the right ventricle to the lungs.
49
Quadrangular Space
Spatium axillare laterale
A four-sided anatomical gap in the shoulder region that allows passage of the axillary nerve and posterior circumflex humeral artery.
50
Quadratus Femoris
Musculus quadratus femoris
A short, flat muscle of the hip that rotates the thigh outward and helps stabilize the hip joint.
51
Quadratus Lumborum
Musculus quadratus lumborum
A deep muscle of the posterior abdominal wall that stabilizes the lower spine and helps bend the trunk sideways.
52
Quadriceps
Musculus quadriceps femoris
A group of four large muscles on the front of the thigh that extend the knee and stabilize the kneecap.
53
Radius
Radius
One of two long bones of the forearm, located on the thumb side and rotating around the ulna.
54
Red Marrow
Medulla ossium rubra
The blood-cell-producing tissue inside many bones, where new red cells, white cells, and platelets are made throughout life.
55
Rotator Cuff
Musculi rotatores
A group of four muscles and their tendons that surround the shoulder joint and keep the head of the humerus seated in the socket.
56
Scalp
Pericranium
The soft tissue layers covering the top of the skull, including skin, dense connective tissue, and the muscle-tendon sheet of the forehead.
57
Scapula
Scapula
The shoulder blade, a flat triangular bone that connects the humerus to the clavicle and supports shoulder motion.
58
Small Intestine
Intestinum tenue
A long, coiled tube where most chemical digestion and nutrient absorption take place.
59
Spinal Cord
Medulla spinalis
The long bundle of nerve fibers and cell bodies running down through the vertebral column from the brainstem.
60
Stomach
Ventriculus
A J-shaped muscular sac that stores swallowed food and begins protein digestion through acid and enzymes.
61
Thyroid Gland
Glandula thyroidea
A butterfly-shaped endocrine gland in the front of the neck that controls metabolism through its hormones.
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Trachea
Trachea
The windpipe, a cartilage-reinforced tube that conducts air between the larynx and the bronchi.
64
Ulna
Ulna
One of two long bones of the forearm, located on the little finger side and forming the main hinge with the humerus at the elbow.
65
Umbilical Cord
Funiculus umbilicalis
A flexible tube connecting the developing fetus to the placenta, carrying blood between the two.
66
Urethra
Urethra
A tube that carries urine from the bladder out of the body, and in males also carries semen during ejaculation.
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Urinary Bladder
Vesica urinaria
A muscular sac in the pelvis that stores urine until it is voluntarily released through the urethra.
68
Uvula
Uvula palatina
A small fleshy lobe hanging from the back of the soft palate that helps with swallowing and speech.
69
Vasti
Musculi vasti
The three vastus muscles of the thigh that, together with the rectus femoris, make up the quadriceps group.
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Vena Cava
Vena cava
The two largest veins in the body, returning deoxygenated blood from systemic circulation to the right atrium of the heart.
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Vertebrae
Vertebrae
The 33 bones that stack to form the spinal column, supporting the body and protecting the spinal cord.
72
Vocal Cord
Plica vocalis
One of a pair of folds of mucous membrane in the larynx that vibrate to produce sound during speech and singing.
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Wernicke Area
Area Wernicke
A region of the dominant cerebral hemisphere essential for understanding spoken and written language.
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White Matter
Substantia alba
The pale, deeper layer of the brain and spinal cord made up of myelinated nerve fibers connecting different regions.
75
Xiphoid Cartilage
The cartilaginous tip of the xiphoid process in young people, before it ossifies, providing flexibility at the inferior sternum.
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Yellow Bone Marrow
Medulla ossium flava
A fatty tissue found in the central cavities of long bones, serving as an energy reserve and a backup site for blood cell production.
77
Yolk Sac
Saccus vitellinus
An early embryonic membrane that provides nutrients and the first blood cells before the placenta takes over.
78
Zona Fasciculata
Zona fasciculata
The middle and largest layer of the adrenal cortex, producing cortisol and other glucocorticoid hormones.
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Zona Glomerulosa
Zona glomerulosa
The outermost layer of the adrenal cortex, producing aldosterone to regulate sodium balance and blood pressure.
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Zona Reticularis
Zona reticularis
The innermost layer of the adrenal cortex, producing weak androgens that supplement gonadal sex hormones.
81
Zygomatic Arch
Arcus zygomaticus
The bony arch on the side of the face formed by the temporal and zygomatic bones, visible as the upper cheek ridge.
82
Zygomatic Bone
Os zygomaticum
The cheekbone, a paired bone that forms the prominence of the cheek and the lateral wall of the eye socket.
83
Zygomaticus Major
Musculus zygomaticus major
A facial muscle that draws the corner of the mouth upward and outward, producing the characteristic action of smiling.
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