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Atrium
Atrium cordis
Either of the two upper chambers of the heart that receive blood returning from circulation.
Below are body parts that contain the letter M anywhere in the name. Each of the 38 body parts below opens to a full profile.
Table of contents
List of Body Parts That Contain M
2
Diaphragm
Diaphragma
A dome-shaped sheet of muscle separating the thoracic and abdominal cavities and serving as the main muscle of breathing.
3
Duodenum
Duodenum
The first and shortest section of the small intestine, where stomach contents mix with digestive juices from the pancreas and liver.
4
Ethmoid Bone
Os ethmoidale
A delicate central bone of the skull base that contributes to the eye sockets, nasal cavity, and nasal septum.
5
6
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.
7
Gum
Gingiva
The firm pink tissue that surrounds the base of each tooth and covers the jawbone, also called the gingiva.
8
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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.
12
Ilium
Os ilium
The large flared upper portion of the hip bone that forms the crest you can feel at your waist.
13
Ischium
Os ischii
The lower and posterior portion of the hip bone, supporting body weight during sitting.
14
Jejunum
Jejunum
The middle section of the small intestine where most nutrient absorption takes place after food leaves the duodenum.
15
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.
16
Lacrimal Sac
Saccus lacrimalis
A small pouch at the inner corner of the eye that collects tears before they drain into the nose.
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18
Metacarpals
Ossa metacarpi
Five long bones in the palm of the hand that connect the wrist to the fingers.
19
Mouth
Cavitas oris
The oral cavity, the entry point of the digestive tract where food is taken in, chewed, and mixed with saliva.
20
Multifidi
Musculi multifidi
A column of deep, short back muscles that span two to four vertebrae each and stabilize the spine.
21
Pulmonary Artery
Arteria pulmonalis
A short, large vessel that carries deoxygenated blood from the right ventricle to the lungs.
22
Quadratus Femoris
Musculus quadratus femoris
A short, flat muscle of the hip that rotates the thigh outward and helps stabilize the hip joint.
23
Quadratus Lumborum
Musculus quadratus lumborum
A deep muscle of the posterior abdominal wall that stabilizes the lower spine and helps bend the trunk sideways.
24
Rectum
Rectum
The final straight section of the large intestine that stores fecal material before elimination.
25
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.
26
Small Intestine
Intestinum tenue
A long, coiled tube where most chemical digestion and nutrient absorption take place.
27
Sternum
Sternum
The breastbone, a flat bone in the middle of the chest that anchors the ribs and protects the heart and great vessels.
28
Stomach
Ventriculus
A J-shaped muscular sac that stores swallowed food and begins protein digestion through acid and enzymes.
29
Umbilical Cord
Funiculus umbilicalis
A flexible tube connecting the developing fetus to the placenta, carrying blood between the two.
30
White Matter
Substantia alba
The pale, deeper layer of the brain and spinal cord made up of myelinated nerve fibers connecting different regions.
31
Wisdom Tooth
Dens serotinus
The third molar at the very back of each side of the jaw, usually the last permanent tooth to erupt in early adulthood.
32
X Chromosome
Chromosoma X
A sex chromosome found in all human cells, present as two copies in genetic females and one copy in genetic males.
33
Y Chromosome
Chromosoma Y
The smaller of the two sex chromosomes, found only in genetic males and carrying the master switch for male sex determination.
34
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.
35
Zona Glomerulosa
Zona glomerulosa
The outermost layer of the adrenal cortex, producing aldosterone to regulate sodium balance and blood pressure.
36
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.
37
Zygomatic Bone
Os zygomaticum
The cheekbone, a paired bone that forms the prominence of the cheek and the lateral wall of the eye socket.
38
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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