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TEKS 10 A & B, 11A Reproductive System TAKS Objective 2 – The student will demonstrate an understanding of living systems and the environment. TEKS Science Concepts 10 A & B The student knows that, at all level of nature, living systems are found within other living systems, each with its own boundary and limits. The student is expected to: (A) interpret the functions of systems in organisms including circulatory, digestive, nervous, endocrine, reproductive, integumentary, skeletal, respiratory, muscular, excretory, and immune; (B) compare the interrelationships of organ systems to each other and to the body as a whole; 11 A The student knows that organisms maintain homeostasis. The student is expected to: (A) identify and describe the relationships between internal feedback mechanisms in the maintenance of homeostasis. TAKS Objective 2 page 1 BIOLOGY For Teacher’s Eyes Only Teacher Background: There are twelve major organ systems in the human body (i.e., circulatory, skeletal, respiratory, excretory, integumentary, nervous, digestive, endocrine, reproductive, immune, lymphatic, and muscular systems). In this TEKS, we will introduce students to the common structures of each system and their basic functions. A brief description of these systems follows: Reproductive System – Unlike many other systems, organisms can live a healthy long life without using their reproductive systems and producing offspring. However, for a species to continue, some individuals must produce offspring. This is the major function of the reproductive system; to ensure continued survival of a species of organism. There are four main functions of the reproductive system: 1. To produce gametes (egg and sperm cells) 2. To maintain and transport these gametes. 3. Production of hormones 4. Nurture and product the developing offsping Positive Feedback Mechanisms - In a positive feedback system the change will continue to increase in one direction until something happens in the body to stop it. For example, contractions of the uterus are triggered by pressure against the cervix during childbirth. This pressure causes the release of a hormone, oxytocin. The contractions will continue until the child exits the womb. Testosterone production is another example of a positive feedback system. Student Prior Knowledge Students should be familiar with the components associated with body systems TEKS 6.10 (C) identify how structure complements function at different levels of organization including organs, organ systems, organisms, and populations and the functions of these systems. TAKS Objective 2 page 2 BIOLOGY The Reproductive System 5 E’s ENGAGE Watch development clip from PBS video Universe Within. Have students complete the film guide while watching the video. EXPLORE Explore 1 Students will complete a coloring activity from an anatomy-coloring workbook. Explore 2 Have student familiarize themselves with the reproductive glands and their functions by completing the endocrine system worksheet in the Blackline Masters. EXPLAIN Complete the Reproductive System PowerPoint presentation using the following manipulative to represent the different parts of the reproductive system: Sugar packets – sugar granules – eggs Broccoli Florets – sperm Straw 11 cm – Fallopian Tubes Spools of tread – seminiferous tubules Walnut -ovary Balloons – uterus TAKS Objective 2 page 3 BIOLOGY ELABORATE Watch the live birth sequence at the end of Miracle of Life and discuss the hormones (Endocrine System) role in labor. Refer back to feedback mechanism and discuss the differences between a positive feedback mechanism and a negative feedback mechanism. Homeostasis simulation: Draw a straight line across the board. Explain to students that you want your finger to stay on the straight line while you have your eyes closed. They are going to help you by patting on their desk. If they pat faster, you will move your finger up. If they pat slower, you will move your finger down. If they are all patting at the same consistent rhythm you will know that you are on the line. This will demonstrate how the endocrine system has a continual ebb and flow of hormones that attempts to keep our body in equilibrium. EVALUATE 1. Using their text, student will correctly identify and color the reproductive system structures. A grade of pass/fail will be given for correctly identifying the reproductive organs. 2. Using the text, class notes and class discussion the learner will correctly match 7 out of 10 reproductive structures with their function. TAKS Objective 2 page 4 BIOLOGY TAKS Objective 2 page 5 BIOLOGY The Universe Within Reproduction 1. A woman is born with all the _______ she will ever have. 2. Only _____ eggs will grow to maturity. 3. Female eggs are stored in __________. 4. Male sperm are found in _______ feet of testicles. 5. Sperm are created at the rate of __________ each second. 6. During __________ an egg is expelled from the ovary. 7. It takes _____ days for the egg to travel to the uterus. TAKS Objective 2 page 6 BIOLOGY Teacher’s Film Guide Answers The Universe Within Reproduction 1. A woman is born with all the eggs she will ever have. 2. Only 400 eggs will grow to maturity. 3. Female eggs are stored in ovaries. 4. Male sperm are found in 300 feet of testicles. 5. Sperm are created at the rate of a thousand each second. 6. During ovulation an egg is expelled from the ovary. 7. It takes 4 days for the egg to travel to the uterus. TAKS Objective 2 page 7 BIOLOGY The Reproductive System Directions: Below are labeled diagrams of the male and female reproductive systems in the human. Next to the diagram are lettered lists of structures. Each of the structures has a function. Refer to the diagrams. In the blanks next to the statements below, write the letter of the structure that is described. Not all terms are used. GET NEW PICTURES AND LABEL WITH LETTERS __ 1. Passage leading from the outside of the body to the uterus. __2. Reproductive organ that produces sperm __3. Narrow tube that carries semen or urine from the male body. __4. The narrow neck of the uterus. __5. External male organ through which semen passes to the outside of the body __6. Pear-shaped organ with thick, muscular wall that holds a developing uterus. __7. External sac that encloses the testes. __8. Narrow tube leaving the each testis through which sperm travels. __9. Reproductive organ that produces eggs. __10. Narrow tube that carries the eggs. TAKS Objective 2 page 8 BIOLOGY