Structures of the Skeletal System: - · Joint-two bones that come together at a joint, which vary in type, allows for movement
· Cartilage- a tough but flexible tissue that covers the ends of bones
· Ligament- connective tissue that binds one bone to another.
· Tendons- connective tissues that attaches to the bone. Aides in movement of bone or structure.
striated muscle - · (skeletal muscle)-moves all bones, controls facial expressions, and eye movements.
smooth muscle - · (visceral muscle) lines the walls of the internal organs, such as the intestines.
cardiac muscle - · (unique) is a combination of striated and smooth muscle.
central nervous system - (brain and spinal cord)- messages travel through the spinal cord to the brain, and the brain in response directs all functions for the body
peripheral nervous system - consists of all nerves outside the brain and spinal cord. They relay messages between the CNS and other areas of the body, including sensory organs.
Respiratory system key structures and organs - · consists of lungs, passageways for air flow, blood vessels, and muscles.
· They work together to bring oxygen into the body and expel carbon dioxide, that is produced during metabolism.
· Lungs-primary organ- which exchange gases (oxygen and carbon dioxide) during breathing.
upper respiratory tract - nose, pharynx (throat), and larynx (voice box)
lower respiratory tract - · trachea, (windpipe), bronchial tree, and lungs
Respiration - events that deliver oxygen into the body followed by the transfer of carbon dioxide out of the body. This occurs in tiny air sacks called alveoli.
Respiratory Process - oxygen is delivered from the air through the respiratory passages into the air sacks in the lungs. Oxygen move int the blood in the capillaries. Carbon dioxide moves from blood to air sacks through respiratory passages and is expelled through mouth or nose.
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