This Activity 2B worksheet challenges students to fill in the blanks on a concept map connecting various body systems like the nervous, circulatory, and digestive systems.

To solve the problem and label the diagram, we need to identify how different body systems interact and depend on each other. The task involves filling in the blanks with the appropriate terms provided at the bottom of the image. Let's go through the diagram step by step and fill in the missing labels.

Diagram Analysis and Labeling

#### 1. Nervous System
- Label 1: Brain
- The nervous system includes the brain, which is the central organ for processing information and controlling body functions.
- Label 2: Spinal cord
- The spinal cord is part of the nervous system and transmits signals between the brain and the rest of the body.

#### 2. Endocrine System
- Label 3: Hormones
- The endocrine system produces hormones that regulate various bodily functions.
- Label 4: Pituitary gland
- The pituitary gland is a key endocrine gland that secretes hormones regulating growth, metabolism, and other bodily functions.

#### 3. Reproductive System
- Label 5: Testes
- In males, the testes produce sperm and hormones like testosterone.
- Label 6: Ovaries
- In females, the ovaries produce eggs (ova) and hormones like estrogen and progesterone.
- Label 7: Sperm
- Sperm are male reproductive cells produced by the testes.
- Label 8: Eggs (ova)
- Eggs are female reproductive cells produced by the ovaries.

#### 4. Skeletal System
- Label 9: Bones
- The skeletal system includes bones, which provide support, protection, and movement.
- Label 10: Joints
- Joints connect bones and allow for movement.

#### 5. Muscular System
- Label 11: Muscles
- The muscular system includes muscles, which work with the skeletal system to produce movement.
- Label 12: Movement
- Muscles contract to facilitate movement.

#### 6. Respiratory System
- Label 13: Lungs
- The respiratory system includes the lungs, which are responsible for gas exchange (oxygen and carbon dioxide).
- Label 14: Air
- Air enters the lungs during inhalation.
- Label 15: Oxygen
- Oxygen is absorbed into the bloodstream from the lungs.
- Label 16: Carbon dioxide
- Carbon dioxide is expelled from the bloodstream into the lungs during exhalation.

#### 7. Circulatory System
- Label 17: Heart
- The circulatory system includes the heart, which pumps blood throughout the body.
- Label 18: Blood
- Blood transports oxygen, nutrients, hormones, and waste products throughout the body.
- Label 19: Transport
- The circulatory system transports substances like oxygen, nutrients, and hormones.

#### 8. Digestive System
- Label 20: Stomach
- The digestive system includes the stomach, which breaks down food.
- Label 21: Esophagus
- The esophagus is a tube that transports food from the mouth to the stomach.
- Label 22: Absorbed
- Nutrients from digested food are absorbed into the bloodstream.
- Label 23: Food
- Food enters the digestive system and is broken down.

#### 9. Urinary System
- Label 24: Kidneys
- The urinary system includes the kidneys, which filter blood and produce urine.
- Label 25: Bladder
- The bladder stores urine until it is expelled from the body.
- Label 26: Urine
- Urine is the waste product produced by the kidneys and stored in the bladder.

#### 10. Integumentary System
- Label 27: Skin
- The integumentary system includes the skin, which protects the body, regulates temperature, and prevents water loss.
- Label 28: Regulate Temperature
- The skin helps regulate body temperature through processes like sweating and vasodilation/vasoconstriction.

Final Answer

Here is the completed labeling of the diagram:

1. Brain
2. Spinal cord
3. Hormones
4. Pituitary gland
5. Testes
6. Ovaries
7. Sperm
8. Eggs (ova)
9. Bones
10. Joints
11. Muscles
12. Movement
13. Lungs
14. Air
15. Oxygen
16. Carbon dioxide
17. Heart
18. Blood
19. Transport
20. Stomach
21. Esophagus
22. Absorbed
23. Food
24. Kidneys
25. Bladder
26. Urine
27. Skin
28. Regulate Temperature

Thus, the final answer is:

\boxed{
\text{1. Brain, 2. Spinal cord, 3. Hormones, 4. Pituitary gland, 5. Testes, 6. Ovaries, 7. Sperm, 8. Eggs (ova), 9. Bones, 10. Joints, 11. Muscles, 12. Movement, 13. Lungs, 14. Air, 15. Oxygen, 16. Carbon dioxide, 17. Heart, 18. Blood, 19. Transport, 20. Stomach, 21. Esophagus, 22. Absorbed, 23. Food, 24. Kidneys, 25. Bladder, 26. Urine, 27. Skin, 28. Regulate Temperature}
}