You need Feb 15 2019 Clean paper pencil

You need: Feb. 15, 2019 Clean paper / pencil Structure WS (musculoskeletal) Mental Math for Warm Up – be ready! Warm Up: I will say each MENTAL math problem two times…and only two times. Do NOT write anything but your answer – everything else is MENTAL! I CAN: identify the parts and functions of the musculoskeletal and reproductive systems.

Mental Math – NO TALKING! Remember – you ONLY write the answer, not the problem or calculations. Each problem will be shown on screen for only a short time.

Mental Math – NO TALKING! 1. ) 13 + 64 = ______

Mental Math – NO TALKING! 2. ) $10. 00 - $2. 25 = ______

Mental Math – NO TALKING! 3. ) 100 points – 34 points = ______

Mental Math – NO TALKING! 4. ) 9 - 16 = ______

Mental Math – NO TALKING! 5. ) 7 pencils x 6 classes = ______

Mental Math. Normally, we would trade and grade. We will NOT do that today. • Be sure to have your name on the paper, though – and the DATE…FEB. 15, 2019 •

Today’s checklist: Ø Check Human Body Systems Chart = Nervous/Endocrine. Ø Check Structure, Movement, and Control WS…which tells about the Musculoskeletal system. Ø Fill in Reproductive System notes. Ø Test on Tuesday!

The Nervous System

The Nervous System • What is its FUNCTION? Receives information about what’s happening inside and outside the body. • Directs the way your body responds to this info. • Helps maintain homeostasis. •

The Nervous System • The nervous system is made up of the: • Brain • Spinal Cord Network of Nerves that branch out to ALL parts of your body •

A Neuron (Nerve Cell) AXON TIPS AXON DENDRITES CELL BODY • Neurons carry information through the nervous system. • There are BILLIONS of neurons in your body. • They are constantly sending/receiving messages. • The message that a neuron carries is a nerve impulse.

A Neuron (Nerve Cell) AXON TIPS AXON DENDRITES CELL BODY Direction message travels AXON – carries the messages down to the AXON TIPS, which sends the message to the next neuron. • DENDRITES – receive messages and sends them toward CELL BODY (contains a nucleus).

The Synapse • An impulse travels down the axon to the axon tips where it either travels to another neuron or to a muscle or gland to carry out a response. • The junction where one neuron can transfer an impulse to another structure is called a synapse.

Re-visit the Human Body Chart Ø You’ve reviewed the DECR systems (even put information into a chart). Ø Let’s add a page with Nervous on one side and Endocrine on the other. 3 holes…so it goes in the binder.

Structure, Movement, and Control Muscular Skeletal Protect organs Provide support Help mvmt Store minerals BONES Ligament Tendon Cartilage Compact Spongy

Structure, Movement, and Control Works with skeleton Helps you move Strong (not long-lasting) In heart only Strong, long-lasting (enduring) Endocrine Nervous Receive Internal organs Must work for a long time (enduring) Process Respond to

Homework: • • • As always, review your notes. Finish the Nervous/Endocrine chart Finish the Structure, Movement, and Control notes. ORGANIZE your binder. We will test next week!!

The Reproductive System Everything you want to know about how humans grow, develop and reproduce!

What’s the function of the reproductive system? Ø To l l make sure the species survives… by passing on your genes… when you make babies (more humans)! Ø How does the reproductive system do it? • It produces hormones that control how you develop (puberty) • It produces sex cells (egg and sperm cells) • It transports and sustain these cells • The female reproductive system nurtures the developing offspring

What is sexual reproduction? Ø Sexual l reproduction just means: the female produces an egg the male produces sperm the two sex cells join together during fertilization to produce an offspring. Ø Most organisms on earth sexually reproduce –plants, insects, animals, humans, etc. . . Ø Sexual reproduction makes sure you have a variety of genes – half from EACH parent! Having variety is GOOD for the SPECIES!

The Male Reproductive System Ø Testes l l produce: Sperm (sex cells) Testosterone (hormone that controls sexual maturation in Ø Scrotum: l external pouch of skin that holds the (keeps them cooler) men) testes 2 -3°C

The Male Reproductive System Ø Sperm mix with fluids from the glands to form semen, which leaves the body through a tube called the urethra in the penis. Ø Urine also leaves through the urethra, but not at the same time!

The Female Reproductive System Ø Ovaries l l produce: Eggs (sex cell) Estrogen (hormone that controls sexual maturation in women) Ø Fallopian tubes: carry the eggs to the uterus where a fertilized egg would attach to the wall and develop into an embryo/fetus.

The Female Reproductive System Ø Unfertilized eggs break down and leave the uterus through the cervix, then exit through the vagina. Ø The vagina is also called the birth canal (how the baby leaves the mother’s body).

Ø What l l does it happen? Usually begins ages 8 -13 for girls; ages 10 -15 for boys, and can last 5 -6 years. Ø What l is puberty? A period of time when your body changes to become sexually mature (able to reproduce). Ø When l What is puberty? causes puberty? Hormones (chemicals that control your body’s development) produced by your brain and your ovaries/testes cause your body to change. Males: Testosterone Females: Estrogen

What happens at puberty? Ø Physical Changes • Body Size and Shape l l Males get taller, broader shoulders Females develop breasts, wider hips, • Body Hair l Underarms, pubic area, facial hair (males) • Other changes l l Voice deepens for males Menstrual cycle begins for females Ø Emotional l l Changes Feeling moody Sexual feelings

Extra – not required The Menstrual Cycle “Monthly” cycle of changes in the female reproductive system. Ø How the body prepares for pregnancy. Ø

Extra – not required Now that we know the basics… Ø How does fertilization happen? l The path of the egg l The path of the sperm

The Human Extra. Life – not required Cycle What happens after the egg is fertilized? Ø The egg is fertilized in the fallopian tubes. Ø This cell travels for 5 days and divides many times before it enters the uterus. In the uterus, it attaches to the lining and begins to develop. Ø The first 2 weeks. Ø

Extra – not required What happens during pregnancy? Ø Pregnancy lasts 38 weeks after conception (40 weeks after last period). Ø For the first 8 weeks, the developing human is called an embryo. Ø After the 9 th week until birth, the embryo is called a fetus. 5 weeks 14 weeks 24 weeks

Extra – not required What happens during pregnancy? Ø In 9 months, the fetus grows from a single cell to a fully formed human baby weighing 7 -8 pounds! Ø Amazing transformations happen as the fetus grows - bones and muscles form, the heart begins to beat, eyes and ears start working…. 14 weeks 5 weeks 24 weeks

The Human Extra. Life – not required Cycle Protecting and Nourishing the Fetus Inside the uterus, 2 membranes protect and nourish the baby. Ø Amniotic Sac – filled with fluid, it cushions the baby. Ø Placenta – links the mother and fetus. Oxygen & nutrients pass from the mother to baby here. Ø The umbilical cord links the baby to the placenta. Ø

Extra – not required What happens during birth? Ø The l l birth of a baby has 3 stages: Afterbirth Labor – strong, – contractions muscular contractions of the of Delivery – the baby is pushed out uterus of the push uterus. the placenta The the cervix out of enlarges the to of fitthe uterus through vagina anduterus. out baby’s head. (lasts 2 -20 hours!) mother’s body.

Extra – not required Find out more about the late stages of pregnancy and the birth process… The Third Trimester