How do lungs help cells in the body meet their needs?
Answer options with 4 options
A.
They produce oxygen for the body.
B.
They bring oxygen from air into the body.
C.
They transform oxygen from the body into carbon dioxide.
D.
They release oxygen from food and send it through the body.
B. They bring oxygen from air into the body.
Use the diagram to answer the question.
Information
A diagram.Short description, A diagram.,Long description,
The food web diagram shows a hawk at the top and grass at the bottom.
Hawks consume thrush (bird), mice, rabbit, and snake.
Thrush consume caterpillar.
Snakes consume rabbit and mice.
Caterpillars, rabbits, and mice consume grass.
Question
What would ,begin emphasis,most,end emphasis, likely happen in this ecosystem if the population of rabbits decreases?
Answer options with 4 options
A.
The number of mice will increase.
B.
The number of snakes will increase.
C.
The animals that used to eat rabbits will eat grass.
D.
The animals that used to eat rabbits will eat wildflowers.
A. The number of mice will increase.
Students were asked to classify an unknown organism. They were given this information: The organism is multicellular. Organs are present that allow the organism to reproduce sexually. Organelles are present that contain chlorophyll.
How would the unknown organism ,begin emphasis,most,end emphasis, likely be classified?
Answer options with 4 options
A.
animal
B.
fungus
C.
human
D.
plant
D. plant
B. They bring oxygen from air into the body.
The correct answer is B. They bring oxygen from air into the body.
Lungs play a vital role in the respiratory system, which helps cells in the body meet their oxygen needs. When we inhale, air enters the nasal passages and travels into the lungs through the trachea and bronchial tubes. In the lungs, oxygen from the inhaled air is transferred to the bloodstream through tiny air sacs called alveoli. These alveoli are surrounded by a network of capillaries, where the exchange of gases takes place. Oxygen molecules from the inhaled air diffuse across the thin walls of the alveoli and into the bloodstream, where they attach to red blood cells.
The oxygen-rich blood is then transported to the body's cells, where it is used in the process of cellular respiration. Cellular respiration is the metabolic process by which cells convert oxygen and nutrients into energy, releasing carbon dioxide as a byproduct. This carbon dioxide is then transported back to the lungs, where it is exhaled.
So, while the lungs do not produce oxygen themselves, they bring in oxygen from the air we breathe and facilitate its transfer to the bloodstream, allowing cells in the body to meet their oxygen needs.