Tag: biology

Capillaries are essential for the delivery of oxygen to the tissues and the exchange of nutrients between blood and interstitial fluid surrounding the cells. This function is well supported by the anatomy of the vessels. The thin walls of the capillaries are composed of a single layer of endothelial cells. As a result, gasses such as oxygen and carbon dioxide can diffuse through their walls, as can lipid soluble substances.
Capillaries also play an important role in regulating the relative volume of the blood and interstitial fluid by allowing a bulk flow through their walls. This exchange of water and solutes occurs in response to the pressure gradient across the capillary wall.
Therefore, the correct answer is option B.

The endothelium is a type of epithelium that lines the interior surface of organs. It is present in the inner lining of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall. It is a thin layer of simple squamous cells called endothelial cells. Whereas hemocyte is a blood cell, especially in an invertebrate, parietal cells (also known as oxyntic or delomorphous cells), are the epithelial cells that secrete hydrochloric acid (HCl) and intrinsic factor and chondrocyte is a cell that has secreted the matrix of cartilage and become embedded in it. Thus, option D is correct.

In order for blood to perform its essential functions of bringing nutrients and oxygen to the cells of the body, and carrying waste materials away from those cells, the chemical composition of the blood must be carefully controlled. Blood contains particles of many different sizes and types, including cells, proteins, dissolved ions, and organic waste products. Some of these particles, such as proteins like hemoglobin, are essential for the body. Others, such as urea (a waste product from protein metabolism), must be removed from the blood or they will accumulate and interfere with normal metabolic processes. But the largest responsibility for maintaining the chemistry of the blood falls to the kidneys, a pair of organs located just behind the lining of the abdominal cavity. It is the job of the kidneys to remove the harmful particles from the blood and to regulate the blood's ionic concentrations, while keeping the essential particles in the blood. Dialysis is a process for removing waste and excess water from the blood and is used primarily as an artificial replacement for lost kidney function in people with kidney failure.

The style is the part of the pistil which leads to the formation of the pollen tube.
Stigma is the part of the pistil which holds the pollen.
Stamen is the male reproductive part of the flower which is made up of two parts the filament which is a stalk that attaches to anther bilobed structure that forms pollen grains.
The ovary is the main female part that leads to the formation of an ovum.
So, the correct option is 'Stamens'.

Anther is the bilobed structure that forms pollen grains which are attached with a stalk known as filament and they combine to form the stamens which are known as the male reproductive part of a plant.

Corolla is the nonessential unit of a flower and is composed of petals and are colored with distinct shapes and sizes which helps to attract pollinators.

Stamen or androecium are the male reproductive part and responsible for the production of pollen grains (male gamete). Pistil or gynoecium are the female reproductive part and produce ovum (female gamete). If both the organs are present it is called bisexual flower. If one of them is present the flower is referred to as unisexual.
So the correct option is 'Pistil and stamen'.

1.  Anthology is the published collection of writings.
2. Phenology is the study of cyclic and seasonal natural phenomenon in relation to climate plant and animal life.
3. Floriculture is the branch of biology that deals with the study of a flower.
4. Agrostology is the branch of botany that deals with grasses.