Answer: Testosterone
Explanation: Testosterone is a hormone produced in the human body. In women the ovaries and adrenal gland produce testosterone which is released in small quantities into the blood stream. In women normal level of testosterone ranges from 15- 70 nanogram per deciliter. Low levels of testosterone in women can lead to lower sex drive, obesity, depression, lack of muscle tissue, weak bones and fertility issues.
Most likely Selective Breeding (c)
Answer:
A. it provides them with nutrients
Explanation:
Answer:
Respiratory System: The respiratory system's main job is to move fresh air into your body while removing waste gases.
Nostril: To warm air on inhalation and remove moisture on exhalation.
trachea: Serves as passage for air, moistens and warms it while it passes into the lungs, and protects the respiratory surface from an accumulation of foreign particles.
bronchiole: To deliver air to a diffuse network of around 300 million alveoli in the lungs.
alveoli: To exchange oxygen and carbon dioxide molecules to and from the bloodstream during breathing.
pharynx: Helps the respiratory system by allowing air to make its way to the respiratory tract.
larynx: Produces vocal sounds and prevents the passage of food and other foreign particles into the lower respiratory tracts.
lungs: To help oxygen from the air we breathe enter the red cells in the blood.
ribs: To aid respiration and help protect the lungs.
diaphragm: Contracts and flattens when you inhale. Creates a vacuum effect that pulls air into the lungs, and relaxes when exhaling.
Oxygen is the answer for this question.
