Skeletal
This division includes the arms, legs, shoulders, and pelvis.
What is the appendicular skeleton?
The functional unit of muscle contraction.
What is a sarcomere?
This layer of skin contains blood vessels and sensory receptors.
What is the dermis?
These muscles work in pairs, one contracting while the other relaxes.
What are antagonistic muscles?
This is the largest artery that carries blood from the left ventricle.
What is the aorta?
This mineral makes up the framework of bone tissue.
What is calcium phosphate?
The tiny air sacs where gas exchange occurs in the lungs.
What are alveoli?
This node acts as the natural pacemaker of the heart.
What is the sinoatrial (SA) node?
These vessels carry blood away from the heart.
What are arteries?
These horizontal canals connect osteons and link them to the periosteum.
What are Volkmann’s canals?
The process by which cartilage becomes bone.
What is ossification?
These two proteins slide past each other to cause contraction.
What are actin and myosin?
The “lub-dub” sound of the heartbeat is caused by these structures closing.
What are heart valves?
This muscle contracts to increase lung volume during inhalation.
What is the diaphragm?
These receptors detect light touch in the skin.
What are Meissner’s corpuscles?
This layer covers and protects bone on the outside.
What is the periosteum?
This structure moves air from the pharynx to the bronchi.
What is the trachea?
The phase of the cardiac cycle when the heart relaxes and fills with blood.
What is diastole?
This condition involves plaque buildup in arteries and can lead to heart attacks.
What is atherosclerosis?
Osteogenic: stem cell; gives rise to osteoblasts
Osteoblasts: form new boney matrix; turn into osteocytes
Osteoclasts: break down old and damaged bone
Osteocytes: maintain boney tissues
This type of joint allows movement in one plane only, like the elbow.
What is a hinge joint?
This type of breathing pulls air into the lungs by expanding volume.
What is negative pressure breathing?
These tiny blood vessels are the site of gas exchange between blood and tissues.
What are capillaries?
This structure prevents food from entering the trachea during swallowing.
What is the epiglottis?
This protein in red blood cells binds and transports oxygen.
What is hemoglobin?