Student Outline: Human Systems



Student Outline: Teacher Key

Excretory System

7-3.3 Summarize the relationships of the major body systems (including the circulatory, respiratory, digestive, excretory, nervous, muscular, and skeletal systems).

Excretory System

• The main function is to filter out cellular wastes, toxins (chemicals that could be poisonous to the body), and excess water that result from cellular respiration.

Systems work

Together

• The circulatory system works with the excretory system to help remove wastes from the body e.g., CO2

7-3.2 Recall the major organs of the human body and their function within their particular body system – Excretory (Urinary)

Kidneys

• The two kidneys filter blood to get rid of urea, excess water, and some other waste materials released by the cells. These are eliminated as urine.

Ureters

• Tubes which connect each kidney to the bladder

Bladder

• A saclike muscular organ which stores urine until it is released from the body

Urethra

• Tube through which urine passes before it is removed from the body

Diagram

Excretory System



Urinary Disease

• Glucose in the urine is often a sign of diabetes since the body cells are not able to take up enough glucose from the blood.

• Protein in the urine might indicate the kidneys are not functioning properly.

Other Systems

Help with Excretion

Respiratory

System

Removes wastes like carbon dioxide, excess water as you breathe out.

These wastes were carried from all parts of the body through the circulatory system to the lungs.

Integumentary

System/Skin

removes chemical waste via the sweat glands through the process of perspiration in the process of maintaining a constant body temperature.

Student Outline:

Excretory System

7-3.3 Summarize the relationships of the major body systems (including the circulatory, respiratory, digestive, excretory, nervous, muscular, and skeletal systems).

Excretory System

• The main function is to filter out cellular wastes,________(chemicals that could be poisonous to the body), and excess ____ that result from ______________

Systems work

Together

• The ___________system works with the excretory system to help remove _______ from the body e.g., CO2

7-3.2 Recall the major organs of the human body and their function within their particular body system – Excretory (Urinary)

Kidneys

• The two kidneys filter ______ to get rid of _____, excess water, and some other waste materials released by the cells. These are eliminated as _________.

Ureters

• _______which connect each kidney to the bladder

Bladder

• A saclike _________ organ which ______ _______ until it is released from the body

Urethra

• Tube through which urine passes before it is __________ from the body

Diagram

Excretory System



Urinary Disease

• _________ in the urine is often a sign of _________since the body cells are not able to take up enough glucose from the blood.

• ________in the urine might indicate the kidneys are not functioning properly.

Other Systems

Help with Excretion

Respiratory

System

Removes wastes like _____________, excess _______ as you breath out.

These wastes were carried from all parts of the body through the ____________system to the lungs.

Integumentary

System/Skin

removes chemical waste via the ___________ through the process of ______________in the process of maintaining a constant body temperature.

Put this on flipchart Pages with pictures of nephron:

a. An overview: Kidneys filter blood and in the process eliminate urea, excess water and some other waste materials (salts, creatinine, ammonia and blood wastes). These wastes are eliminated in urine.

b. Nephrons are like small filters. Blood flows from an artery into a nephron in the kidney. Every drop of blood in your body passes through your kidneys and is filtered more than 300 times a day.

c. The urea, excess water, glucose and other wastes in the blood flow from the cluster of capillaries into the capsule that surrounds them. Blood cells and most proteins do not move into the capsule but stay in the blood.

d. This urea/water/glucose mix then moves through a long twisting tube surrounded by capillaries; as it does some of the water and glucose is reabsorbed into the blood stream, however, most of the urea, stays in the tube and becomes urine

4 Corner Higher level Thinking Questions:

- Every drop of blood in your body passes through your kidneys and is filtered more than ___ times a day.

A.

B.

C.

D.

- Why would it be important to take in salt when the weather is extremely hot?

A.

B.

C.

D.

- If you sweat a lot (fever or exercise) your kidneys will secrete

A. More water as it pass through the nephron making your urine more concentrated.

B.

C.

D.

Engage: Discover What Can You Observe About Skin? P 56 D

A. Compare your hand before and after wearing the glove. What happened to the skin when you wore the glove?

Answer: Moisture on the skin .

B. What caused this?

Answer: Perspiration is one of the functions of the skin.

I. Explore: TRY THIS Sweaty Skin, P 59 D

• Make a prediction which of the two thermometers do you think will have a low temperature? Explain why you made that prediction.

Prediction/Why? The thermometer wrapped in the wet cotton; the process of evaporation utilizes heat energy

• Was your prediction correct?

Answer: .

• Why might an athlete put on a jacket after a workout, even thought he air is warm?

Answer: The jacket will keep the athlete from getting chilled when sweat evaporates.

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