The integumentary system, which is the largest organ system of the human body, is made up of skin, hair, nails and glands. The respiratory system is composed of the respiratory tract and the lungs. How do the integumentary and respiratory systems work together to protect the human body?

A. The two systems allow for the storage of nutrients to fuel the body at a later time.

B. The two systems deliver signals between the outside environment and the brain.

C. The hair and mucus that line the respiratory tract prevent foreign particles from entering the body.

D. The immune cells send electrical signals through the skin to the brain.

For a to be healthy, it has to have lots of different kinds of plants and animals. all of the different types of plants and animals in an ecosystem. name four types of ecosystems from those listed in the video. b) c) d) most living things live here. all living things depend on how an ecosystem like a game of sticks? why should we build new buildings on existing land? name four extinct species from those listed in the video. b) c) d) the best way to wipe out a species is to the largest ecosystem in the world is this percent of the world is covered by water. how many of all species in the world live in the ocean? list five things you can do to increase biodiversity. b) c) d) e) how many species are we losing per hour?

How are viruses different from eukaryotic cells?

To take a whiff of your favorite food, you use both? a. motor nerves and your digestive system b. sensory nerves and your immune system c. motor nerves and your skeletal system d. sensory nerves and your respiratory system