INTEGUMENTORY
What is the main job of the integumentary system?
Protection.
What is the main function of the respiratory system?
Breathing (bringing oxygen in and removing carbon dioxide).
What is the main job of the lymphatic system?
Defense (fights infections and removes harmful bacteria/viruses).
Name three things the skin protects the body from.
Bacteria, viruses, UV radiation, and physical injury (any 3).
Tiny hairs, mucus, and coughing trap and remove dust, germs, and pollutants.
Tiny hairs, mucus, and coughing trap and remove dust, germs, and pollutants.
Name two ways the lymphatic system helps maintain fluid balance.
Collects extra fluid from tissues and returns it to the bloodstream; helps prevent swelling.
How does the integumentary system help regulate body temperature?
Sweat cools the body when it evaporates; blood vessels widen or narrow to control heat loss.
How does the respiratory system work with the circulatory system?
Oxygen enters the blood in the lungs and is carried to all cells; carbon dioxide is brought back to the lungs to be exhaled.
How do lymph nodes help filter harmful substances?
Trap and destroy germs before they spread; act as checkpoints.
Give one example of a disease that affects the integumentary system and explain what causes it.
Disease example:
Acne → blocked oil glands
Eczema → inflamed, itchy skin
Skin cancer → too much UV exposure
Explain why oxygen is important for the body.
Why oxygen is important: Needed for cellular respiration, which releases energy for movement, thinking, and growth.
Why doesn’t the lymphatic system need a pump like blood?
Muscles moving push lymph through the body; movement helps the immune system.
How many dead skin cells does the human body shed every minute?
Dead skin cells shed per minute: 30,000 – 40,000
Why can lungs float on water?
They contain 300–500 million tiny air-filled sacs called alveoli.
List at least four areas in the body where clusters of lymph nodes are found.
Mainly the neck, armpits, chest, abdomen; also smaller clusters in head, behind ears, along arms and legs.