Organisation of Living World Test - 6

Enamel is the hardest substance in the human body and contains the highest percentage of minerals,[1] 96%, with water and organic material composing the rest.

Lymphocyte is not a granulocyte.Granulocytes are a type of white blood cell that is made of small granules, which contain proteins. The types of these cells are neutrophils, eosinophils, and basophils. Granulocytes help the body fight bacterial infections.

Schwann cell is not a component of areolar tissue. It is a part of peripheral nervous system.

Nerve cells do not form any layer but remain structurally separate. They comprises the nervous tissue.

cardiac muscle is immune to fatigue due to the presence of a large number of mitochondria, myoglobin and a good blood supply allowing continuous aerobic metabolism.

pseudo-stratified columnar epithelium is found in trachea.It is a type of epithelium that, though comprising only a single layer of cells, has its cell nuclei positioned in a manner suggestive of stratified epithelia.

Collagen is the major constituent of connective tissues,it is the most abundant protein in mammals, making up from 25% to 35% of the whole-body protein content.

A sarcomere is the basic unit of a muscle. Muscles are composed of tubular muscle cells (myocytes or myofibers), which are formed in a process known as myogenesis.

transitional epithelia forms the inner layer of urinary bladder. It is a type of tissue consisting of multiple layers of epithelial cells which can contract and expand. It is so named because of this function in the transition of degree of distension.

Most of the human neurons are Multipolar. They are the type of neurons that possesses a single (usually long) axon and many dendrites, allowing for the integration of a great deal of information from other neurons.