Interaction Between Systems 1. Cells within the human body require oxygen to function properly and produce carbon dioxide as a waste product.  Which body systems are responsible for maintaining this balance? endocrine and excretory circulatory and respiratory digestive and skeletal muscular and circulatory

2. How do the human respiratory and circulatory systems work together to meet the body's needs? The heart pumps oxygen into the lungs. The lungs pump oxygen into the heart. The heart pumps blood into the lungs. The lungs pump blood into the heart.

3. The digestive system prepares food to be transported by the circulatory system by — A. breaking food into molecules B. exchanging food for oxygen C. using food to repair heart tissue D. turning food into blood cells

4. Carpal tunnel syndrome (CTS) is a condition caused by excess pressure on a nerve in the wrist.  It occurs when the muscles in the hands, wrist and arms are kept tense and the motions of the hands are repetitive for long periods of time.  People who type with poor posture are more likely to have CTS than other people.  The symptoms include tingling and numbness in the hand, pain, and a weak grip. Which body systems are most affected by carpal tunnel syndrome? nervous and muscular muscular and skeletal circulatory and nervous circulatory and skeletal

Homeostasis Feedback Mechanisms Objective: The student will identify key feedback systems and tell how they work to regulate the body.

Homeostasis or equilibrium means to keep balance within an organism.

Examples of homoeostasis: Body temperature can’t be too hot or cold. 98° F is perfect! Blood pressure can’t be too high or low. Blood sugar levels can’t be too high or low.

Your body has to keep the inside stable no matter what is happening on the outside.

Temperature A steady body temperature is important for homeostasis Temperature A steady body temperature is important for homeostasis. Temperatures that are too high or too low can be _______. _____ F is perfect! fatal 98°

our skin, cooling us down. What happens to the body if the outside temperature is 102° F ? We sweat! Sweat evaporates from our skin, cooling us down.

What happens if the outside temperature is 32° F What happens if the outside temperature is 32° F? What does the body do to keep the internal temperature in balance? 1st –We Shiver, this makes our muscles produce heat. 2nd –Goosebumps form, skin pores close up trapping in heat. 3rd- Hair Stands up, helping to hold in heat.

Fever What causes us to have a fever? When bacteria or a virus attacks our bodies we sometimes begin to run a fever. The fever _______ or body temperature and creates a hostile environment that can _______________ that are making us sick. raises kill the germs

Which organ systems are key in temperature homeostasis? SKIN! Integumentary System BRAIN! Nervous System

Vomiting and Diarrhea SOMETIMES people have eaten food that has spoiled or have bacteria that have entered their bodies. This is the bodies response to ______________ of harmful substances. rid the body

B) Blood Pressure – Blood pressure affects how the blood flows throughout the body. Specialized cells within the arteries are sensitive to changes in blood pressure. When blood pressure rises and falls, hormones are released and they send signals to the brain.

The brain then sends messages for the blood vessels to make the walls of the arteries larger or smaller. This allows the blood to flow through the veins more easily.

When blood pressure is too high, the hormones signal the body to hold more water. The extra water makes the blood thinner so the blood flows more easily through the body Once the blood pressure becomes balanced again, the circulatory system goes back to normal.

Which organ systems are important for blood pressure homeostasis? Circulatory System Nervous System Endocrine System (hormones)

Blood Sugar –When we eat, the glucose (sugar) concentration in our blood rises. When blood sugar levels rise too high, a hormone called insulin is released from the pancreas to break down the sugar.

Insulin converts glucose into a form that the liver takes in and stores. As blood sugar levels drop, the hormone called glucagon is released from the pancreas. Glucagon turns stored sugar into glucose for the body to then use. This constant release of hormones keeps the body’s glucose levels in balance.

Which organ systems are important for blood sugar homeostasis? Digestive System Circulatory System Endocrine System (hormones)

Feedback Mechanisms are how the body stays in balance.

Sweat glands are found in human skin Sweat glands are found in human skin. These glands release sweat to help the body cool during exercise. What would MOST LIKELY happen during exercise if a person’s sweat glands were NOT functioning? The body would become overheated. More sweat would be released. The upper layer of skin would become thicker. More hair would grow on the skin.

Harmful bacteria enters a person’s body through contaminanted food Harmful bacteria enters a person’s body through contaminanted food. As a result, the person vomits. This response MOST likely fight infection by ---- A) forcing bacteria to leave the body. B) killing the bacteria with stomach acids. C) creating new cells to hunt and kill bacteria. D) keeping the bacteria away from other people

How does the body respond to dehydration? Raising body temperature Increasing breathing rate Producing less urine Sweating more often

Cells in a person’s body begin to take in large numbers of sugar molecules from the bloodstream. They store the molecules for future use. A person with this type of cellular activity has MOST likely just ----- Gone to sleep C) stopped walking Finished a meal D) begun to exercise

How does exercise affect the circulatory and respiratory systems How does exercise affect the circulatory and respiratory systems? Follow the directions on the back of your paper to explore how these two systems work together.

Get with a partner and begin! Homeostasis & Exercise Interaction Between the Circulatory and Respiratory Systems With your partner, you will determine your at rest breathing rate by counting the number of breaths you take in 15 seconds. You will then do jumping jacks for 1 minute. Immediately following the jumping jacks, you will again count the number of breaths you take in 15 seconds. You will then take a 5 minute break. After the 5 minutes you will again count the number of breaths you take in 15 seconds. Get with a partner and begin!