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Sensory Receptors Perceptions of world are created by the brain from AP sent from sensory receptors. Sensory receptors respond to a particular modality of environmental stimulus. Receptors transduce (change) different forms of sensation to nerve impulses.

67 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 950 | Lượt tải: 0

Functions of Nervous Tissue 1. Sensory Input: Conduction of signals from sensory organs (eyes, ears, nose, skin, etc.) to information processing centers (brain and spinal cord). 2. Integration: Interpretation of sensory signals and development of a response. Occurs in brain and spinal cord. 3. Motor Output: Conduction of signals from brain or sp...

93 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 796 | Lượt tải: 0

Muscular System Components: Skeletal muscles. Functions: Skeletal muscle contraction allows for voluntary movement: Movement and locomotion. Mechanical work: Lifting, pulling, pushing objects. Communication: Body language and facial expression. Homeostatic Role: Allows animals to respond to and control their environment.

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Skeletal System Components: Bones, ligaments, and cartilage. Functions: Along with muscular system: Movement and locomotion. Mechanical work: Lifting, pulling, pushing objects. Body support. Protection of delicate internal organs (brain, heart, lungs, etc.) Calcium storage Homeostatic Role: Helps maintain constant blood calcium levels.

33 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 783 | Lượt tải: 0

Excretory (Urinary) System Components: Kidneys, bladder, urethra, and associated ducts. Functions: Kidneys remove nitrogen containing waste from blood. Urine with waste is temporarily stored in bladder. Excretion of urine. Homeostatic Role: Regulates water levels in body. Removes excess water Helps conserve water

47 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 1094 | Lượt tải: 0

Human Respiratory System Functions: Works closely with circulatory system, exchanging gases between air and blood: Takes up oxygen from air and supplies it to blood (for cellular respiration). Removal and disposal of carbon dioxide from blood (waste product from cellular respiration). Homeostatic Role: Regulates blood pH. Regulates blood ox...

48 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 897 | Lượt tải: 0

Introduction Resistance: Ability to ward off disease. Nonspecific Resistance: Defenses that protect against all pathogens. Specific Resistance: Protection against specific pathogens. Susceptibility: Vulnerability or lack of resistance.

71 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 772 | Lượt tải: 0

Blood Vessels Include arteries, arterioles, capillaries, venules, and veins. Double circuit, closed system: 1. Pulmonary circuit: Delivers blood to lungs. Oxygenation of blood. 2. Systemic circuit: Delivers oxygenated blood to tissues and organs of body (brain, liver, heart, kidneys, etc). Picks up carbon dioxide produced by tissues.

44 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 985 | Lượt tải: 0

1. Blood Average Blood Volume: 4 to 6 liters. Blood composition: 55% Plasma (fluid matrix of water, salts, proteins, etc.) 45% Cellular elements: Red Blood Cells (RBCs): 5-6 million RBCs/ml of blood. Contain hemoglobin which transport oxygen and CO2. White Blood Cells (WBCs): 5,000-10,000 WBCs/ml of blood. Play an essential role in immunity a...

46 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 747 | Lượt tải: 0

Integumentary System Components: Hair, skin, and nails. Functions: Protects the body from: Infection: Barrier to microbes. Mechanical injury Excessive heat or cold: Thermoregulation Water loss Communication: Receives stimuli from environment Gives out subtle signals (blushing, etc.). Homeostatic Role: Helps maintain constant body temp...

56 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 839 | Lượt tải: 0