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Dispatch Week 31 Class 1 Welcome back! There are 32 days left of school. Yikes.

Dispatch Week 31 Class 1 Welcome back! There are 32 days left of school. Yikes. What is the most important function of our skin ? How is a fever helpful to us when we’re sick?

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Dispatch Week 31 Class 1 Welcome back! There are 32 days left of school. Yikes.

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  1. Dispatch Week 31 Class 1 • Welcome back! There are 32 days left of school. Yikes. • What is the most important function of our skin? • How is a fever helpful to us when we’re sick? • The bacteria below enters your body and your immune system makes antibodies for it. Draw what these antibodies look like. • What is a vaccine? • How does a vaccine keep us from getting sick?

  2. How does all the IMMUNE SYSTEM relate to FOOD PRODUCTION? Antibiotic Resistance Antibiotics • Anti= against, bio = life • Chemicals that kills bacteria living conditions • Cramped • Unsanitary • Corn-fed E. coli E.coli populations increase Mastitis • An infection of the udder resulting in pus and blood in the milk

  3. The Endocrine System

  4. Imagine you are sending a message to someone else (ex. Text, email, letter, etc.). • Three parts involved to sending a message: • Sender • Receiver • Message • Function: • sends messages to different parts of the body through the bloodstream. • Hormone: • “The message” • Chemical that acts as a message that affects other parts of the body.

  5. Glands: • “The sender” • Where hormones are made. • Each hormone is made by a specific gland. • Target cell: • “The receiver” • Part of the body that is affected by the hormone • Each hormone has its target cells. Endocrine System Overview

  6. Some Important Hormones Adrenaline: Made in : the adrenal glands Target: brain, muscles, heart, lungs Effect: Alertness, “fight or flight”, fear, excitement Video 1 Video 2

  7. Thyroxine: Made in: the thyroid gland Target: heart, brain, all cells Effect: Increases metabolism and growth

  8. Gonadotrophins: Made in: pituitary gland (brain) Target: ovaries (female) and testes (male) Effect: puberty, sperm and egg production ovaries  produce estrogen testes  produce testosterone

  9. Estrogen: Made in: Ovaries Target: brain, bones, fat, hair, sexual organs Effect: female sexual development

  10. Testosterone: Made in: Testes Target: brain, muscles, hair, larynx, sexual organs Effect: male sexual development

  11. Growth hormone: Made in: pituitary gland Target: fat cells and liver Effect: directly and indirectly stimulates growth, cell reproduction and regeneration in humans and other animals

  12. Insulin: Made in: Pancreas Target: Cells in liver, fat, and muscle Effect: Take in glucose from the blood and stores it as glycogen

  13. Pituitary Gland Gonadotrophins Ovaries Testes Estrogen Testosterone Body cells Body cells

  14. How does all the ENDOCRINE SYSTEM relate to FOOD PRODUCTION? Milk production rBGH/rBST Infection Mastitis Cancer IGF-1 Birth defects

  15. Dispatch Week 31 Class 2 • How do hormones travel through the body? • Why does it appear that girls mature faster than boys? • Name 3 physical or mental changes caused by testosterone. • Name 3 physical or mental changes caused by estrogen. • Puberty always begins with the production of the hormone called ___________________________ in the brain. • Explain how antibiotic resistance may result from the overuse of antibiotics.

  16. The Reproductive System

  17. Let’s review a few terms. Diploid: Having 2 copies of each chromosome (symbol is2n) Haploid: Having one copy of each chromosome (symbol isn) Gamete: a reproductive cell (Egg and sperm) Meiosis: process where 1 cell divides into 4 gametes

  18. Male Reproductive System The function of the Male Reproductive System is to produce and deliver haploid sperm.

  19. Main Parts: • Where meiosis happens Testes • Produces haploid sperm Epididymis • Stores mature sperm • Tube that takes sperm to the urethra Vas deferens • Tube that carries semen and urine Urethra • Carries semen and urine out of the body Penis

  20. Female Reproductive System • The functions of the Female Reproductive System are: • Produce a haploid egg • Support the developing baby

  21. Main Parts: Ovary • Where meiosis happens • Produces haploidegg Fallopian tube • Carries eggs to the uterus • Where fertilization usually happens Uterus • Organ that carries the egg and developing baby • Passage between uterus and vagina Cervix Vagina • Canal that leads to the outside of the body

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