The aortic valve is the final door blood goes through as it exits the heart. Obstruction of that valve is called stenosis and leakage of the valve as it closes after each heartbeat is called regurgitation
It's either hydrogen or nitrogen
Dr. Casson must be a psychiatrist.
A psychiatrist is a medical doctor that has specialized in treating mental health.
A psychiatrist treats a number of different mental disorders and prescribes adequate medicaments.
The nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. Nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and DNA, the building blocks of all life .
Answer:
proteins
Explanation:
carbohydrates and fats are made from three basic molecules: Carbon, hydrogen and oxygen. All proteins contain an element not found in carbohydrates and fats, nitrogen and some proteins also contain sulfur. The main unit that builds all carbohydrates is monosaccharide, or sugar while triglycerides make fats and proteins consist of amino acids.
