1. 7th grade human body system review

2. Human Body Systems Learning Targets
I can describe the components and functions of the digestive system.
I can describe the components and functions of the respiratory system.
I can describe the components and functions of the circulatory system.
I can describe the components and functions of the nervous system.
I can describe the components and functions of the excretory system.
I can describe the components and functions of the muscular system.
I can explain how these systems work together in the human body.

3. DIGESTION

4. ..\Human Body\Digestive System\Digestive Body 3D.notebook
The Digestive System
..\Human Body\Digestive System\Digestive Body 3D.notebook

5. The Digestive System
Digestive system – breaks down food, and absorbs nutrients Digestive System

6. Digestion
Mechanical (M.D.) – physically breaking up food into smaller particles
Chemical (C.D.) – chemically breaking apart food. Usually uses ENZYMES.
Enzymes - are a protein/chemical that helps the chemical reaction along.

7. Your Digestive System
Mouth: Begins digestion with both chemical & mechanical digestion, glands in the mouth produce saliva (CD), and teeth break down food (MD).
mouth

8. Your Digestive System
Esophagus: muscular tube that connects throat to stomach. Moves food down by squeezing (peristalsis)
esophagus

9. Your Digestive System
Stomach: muscular bag where chemical and mechanical digestion continue; food stays here about 4 hours, changes to chyme.
stomach

10. Your Digestive System
Small Intestine: a tube nearly 7 meters long where digestive juices from the liver and pancreas are added; then villi absorbs nutrients from chyme. Most digestion and absorption of food occurs in the small intestine.
Small Intestine

11. Your Digestive System
Pancreas: a small organ that produces enzymes and hormones that help break down food. It also produces insulin to regulate the body's glucose or sugar level. Food does not pass through the pancreas.
pancreas

12. Your Digestive System
Liver: produces bile, which breaks up large particles of fats into smaller particles. It also filters the blood to get rid of toxins. Food does not pass through the liver.
liver

13. Your Digestive System
Gall Bladder: small sac that stores bile produced by liver
Gall bladder

14. Your Digestive System
Large Intestine: absorbs water from undigested food, where unabsorbed materials become more solid
large intestine

15. Your Digestive System
Rectum and anus: Where solid waste is stored in the rectum until the muscles release the waste through the anus
rectum

16. Digestive System Diagram
mouth
esophagus
liver
stomach
gall bladder
large intestine
small intestine
rectum

17. The
Respiratory
System
Respiratory System Brainpop

18. The Respiratory System
Respiratory System - process of inhaling oxygen and exhaling carbon dioxide
Bringing fresh air in; letting stale air out

19. STRUCTURES OF THE RESPIRATORY TRACT
Nasal Cavity
Beginning of the Respiratory Tract
Moistens and warms air;
Mucus & cilia help trap dust and debris

20. STRUCTURES OF THE RESPIRATORY TRACT
Trachea
Air passes through about 12 cm tube with C-shaped rings of cartilage; commonly known as the windpipe

21. STRUCTURES OF THE RESPIRATORY TRACT
Lungs
Spongy, sac-like organs for exchanging oxygen and carbon dioxide

22. STRUCTURES OF THE RESPIRATORY TRACT
Bronchi
two branches off of the trachea that carry air into lungs

23. STRUCTURES OF THE RESPIRATORY TRACT
Bronchioles
Smaller branches of the bronchi

24. STRUCTURES OF THE RESPIRATORY TRACT
Alveoli
Tiny, thin-walled sacs; in clusters; surrounded by capillaries where gas exchange happens

25. STRUCTURES OF THE RESPIRATORY TRACT
Diaphragm
Muscle separating the chest cavity from the intestines/gut.

26. Respiratory System Diagram
Nasal cavity
larynx
trachea
bronchi
bronchioles
diaphragm
alveoli

27. Circulation &
The Heart
The Circulatory System Brainpop

28. The Circulatory System
The circulatory system transports oxygen and nutrients around your body and helps get rid of Carbon Dioxide and wastes

29. What organs, or parts, make up your circulatory system?
Arteries
Veins
Capillaries
Heart
Blood

30. Arteries Types Of Blood Vessels
Moves oxygen-rich blood away from heart
Have thick & elastic walls, made of smooth muscles.
Are connected to ventricles in the heart.

31. Veins Types Of Blood Vessels Moves oxygen-poor blood towards the heart
Have one-way valves
Carries oxygen-poor blood with waste materials

32. Types Of Blood Vessels Capillaries Are microscopic blood vessels.
Connect arteries to veins.
Their walls are only one cell thick!
Nutrients and oxygen flow to body cells through capillary walls.

33. Blood Vessels Clip

34. Blood
Has 4 Jobs to Do:

35. Four Functions of Blood:
1) Carries oxygen to cells and removes carbon dioxide from all body cells

36. Four Functions of Blood:
2) Carries waste products from cell activity to be removed by kidneys

37. Four Functions of Blood:
3) Transports nutrients from the digestive system to all cells.

38. Four Functions of Blood:
4) Carries materials that fight infections and heal wounds.

39. The Heart

40. Heart- a human heart has four chambers
2 Atria and 2 Ventricles
Atria Atria
Ventricle Ventricle

41. Left atrium & left ventricle
*always hold oxygen-rich blood
Right atrium & right ventricle
*always hold oxygen-poor blood

42. Other Heart Parts to Know:
Aorta: delivers oxygen-rich blood from left ventricle to the rest of the body

43. Other Heart Parts to Know:
Pulmonary artery: delivers oxygen-poor blood from right ventricle to lungs

44. Other Heart Parts to Know:
Pulmonary vein:
delivers oxygen-
rich blood from lung into left atria

45. Circulation There are 3 kinds of circulation in your body:
PULMONARY Circulation:
the flow of blood through heart, lungs, and back to the heart again.

46. Circulation There are 3 kinds of circulation in your body:
SYSTEMIC Circulation:
Moves oxygen-rich blood to organs and body tissues and back to the heart again.

47. Circulation There are 3 kinds of circulation in your body:
CORONARY Circulation:
the flow of blood to heart tissues.

48. Muscular System

49. Muscular System
The muscular system consists of skeletal, smooth and cardiac muscles.
It permits movement of the body, maintains posture, and circulates blood throughout the body.

50. Excretory System
The excretory system is in charge of getting rid of bodily wastes and excess water.
There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.

51. Urinary System
Kidneys - The main job of the kidneys is to filter wastes and extra water out of your blood to make urine

52. Ureter
A tube that carries urine from the kidney to the urinary bladder

53. Urethra
A tube that carries urine from the bladder to the outside of the body.

54. Bladder
The urinary bladder is a hollow elastic organ that functions as the body's urine storage tank.

55. Nervous System
The nervous system is made up of the brain, the spinal cord, the nerves, and the sense organs, such as the eye and ear.