Answer :
The correct answer is option A, that is, blood.
Cell theory in biology refers to the universally acknowledged scientific theory that living species are constructed of cells, that is, they are the basic fundamental and structural unit of all species, and that all the cells arises from the pre-existing cells. The theory is credited to Schwann and Schleiden. The three postulates of the theory are:
1. All living species comprises of one or more cells.
2. Cell originate from the pre-existing cells.
3. The cells is the fundamental unit of organization and composition in organisms.
According to the cell theory, the structure that contains cells is blood
Blood is certainly one of the major connective tissue in the human body. It regarded as a connective mainly because is made up of a non-living fluid whereby cells are suspended.
Further Explanation
The plasma is the blood matrix that surrounds the cells and makes up approximately 55% of the blood in the human body.
However, the three types of living cells include
- Red blood cells
- White blood cells
- Platelets
Red blood cells are considered to be the most abundant cells in the human body because of their various functions. They also don’t possess a nucleus. The red blood cells mainly move oxygen and collect carbon dioxide through hemoglobin.
White blood cells are of different types and they are primarily part of the immune system. They help the human body to fight against infection. They spread throughout the body to move to an area where there is an infection in the human body.
The main types of white blood cells include
- Basophils
- Lymphocytes
- Monocytes
- Neutrophils
- Eosinophils
Platelets form platelet plug which helps the blood to clot. A blood clots forms in the body to repair any damage to the blood vessels.
LEARN MORE:
- According to the cell theory, which structure contains cells? https://brainly.com/question/333148
- According to the cell theory, which structure contains cells? https://brainly.com/question/834368
KEYWORDS:
- blood
- cell theory
- cells
- white blood cells
- red blood cells
- platelets
