Answer:
Explanation:
What are the three main building blocks of the body?
Nutrition Proteins: building blocks of the body. Excluding water and fat, the human body is made up almost entirely of protein. Protein is the main component of muscles, bones, organs, skin, and nails.
An adaptation is a characteristic that helps a living thing survive and reproduce. Natural Selection is the change in the characteristics of living things over time. A population consists of many different species. Charles Darwin developed the theory of evolution by natural selection.
How hard the blood pushes on the inside of the blood vessels is called? BLOOD PRESSURE
The total amount of blood the heart pumps in one minute is called ?
CARDIAC OUTPUT
When blood vessels open wider during exercise, they are said to ?
DILATE
How many times your heart beats in one minute is called ?
HEART RATE
The force that can put unhealthy tension on the heart as it is pumping is called ?
BLOOD PRESSURE
The amount of blood the heart pumps out in one beat is called?
STROKE VOLUME
AnswerB, nipples. They have a type of patch on the belly that secretes milk. The young lick from this patch. Edontates do not have teeth.
The contribution of b-cells is mainly in Humoral immunity. Thus Option A is correct.
<h3>
What is immune system?</h3>
Two types of immunity such as innate immunity is an inbuilt nonspecific immune system protect us from all antigens.
Secondly, we have one more sophisticated adoptive immune system which is up two types humoral immunity and cell mediated immunity.
The adoptive response majorly done by two types of cells such as B and T cells.
This type of immune response use past experience identify a specific foreign threats and counteract them when these threats reappear.
The humoral immune system is activated by external macromolecules antibodies, antimicrobial peptides etc. and protect the extracellular spaces of body.
Hence, Option A is correct.
Learn more about immune system, here:
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