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| muscle cells fascia blood vessels and nerves (myofibrils) |
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| fibrous connective tissue that surrounds bundles of muscle fiber |
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| made of 2 types of myofilaments made of proteins |
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thick made of protein-myosin
thin made of protein-actin |
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| explain muscle contraction |
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| myofibrils are chain of sacromeres (contracting units) neuromuscular junction is where a nerve starts a contraction. ACh transmits signal from nerve to muscle (neurotransmitter) |
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| research and analysis of living organisms |
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| chamber that collects blood |
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| where is the bicuspid valve and what does it do? |
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| left side, prevents backflow |
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| what do the vena cavas do? |
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| take blood to heart from the body, (no O2) |
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| layers of the heart and what they are |
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pericardium:contains roots of vessels, generates impulses
myocardium:muscular tissue contracts and conducts eletricity
endocardium: inner lining |
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radial atery (wrist)
Brachial artery (mid-arm)
Temporal (temple)
posterior tibial artery (back of the knee) |
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| brings O2 blood to the body |
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| what is systolic and diastolic pressure |
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systloic- pressure when vessels contract
diastolic- pressure when vessels relax |
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| amount of blood pumped out by each side of the heart in 1 minute. |
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| air-mouth and nose-pharynx-larynx-trachea-bronchii-bronchioles-alveoli-capillaries of lungs-o2 in blood |
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| retina-optic nerve- optic chiasma-optic tract-synapse in thalamus-radiation-optic cortex |
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tunic containing rods and cones
anterior part of sclera "window of world" focuses |
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light enters
"white" of eye, protective coat |
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| transmits electrical impulse fom retina to brain |
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| regulates temperature, metabolism, balance |
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| muscles, balance, measurements |
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| pathway for tracts, breathing and blood pressure |
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| reaction to stimulus vs. relex arc |
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| reaction goes to brain, reflex arc does not |
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CNS- brain and spinal
PNS- motor and sensory
voluntary and involuntary |
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