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Heredity: The transmission of traits from one generation to another. Variation: Offspring are different from their parents and siblings. Genetics: The scientific study of heredity and hereditary variation. Involves study of cells, individuals, their offspring, and populations.

89 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 723 | Lượt tải: 0

Fertilization Ejaculation 300 million sperm, 100 reach (uterine) fallopian tube. Fertilization occurs in the uterine tubes Acrosomal reaction: Acrosome of sperm contains hyaluronidase, an enzyme that digests a channel through zona pellucida. Sperm fuses with ovum cell membrane.

47 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 748 | Lượt tải: 0

Sexual Reproduction Sexual Reproduction: Only organ system that is not essential for individual survival. Continuation of species. Gamete formation (eggs and sperm) cells. Homeostatic Role: Maintains secondary sexual characteristics.

104 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 696 | Lượt tải: 0

Hormones Regulatory molecules secreted into the blood or lymph by endocrine glands. Lack ducts. Carry hormone to target tissue where it produces its effects.

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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.

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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: 665 | 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.

61 trang | Chia sẻ: nguyenlinh90 | Ngày: 23/07/2019 | Lượt xem: 715 | Lượt tải: 0

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: 663 | 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: 942 | 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: 679 | Lượt tải: 0