Animal Tissue and Anatomy

The skin is the largest and heaviest organ of the human body, covering the entire external surface.

According to the histogen theory, the periblem gives rise to cortex.

Peyer's patches are covered by specialized epithelium (follicle-associated epithelium). Some of these epithelial cells have surfaces, which seem folded under the scanning electron microscope. These microfold, or M cells, sample and actively transport particulate antigens from the lumen into the ‘dome’ area, where priming of both T and B lymphocytes occurs.

The nose has two external openings called nostrils, which serve as the entry point for air into the nasal cavity. Larynx, pharynx, and trachea are internal structures of the respiratory system.

The trachea is the tube that connects the larynx to the bronchi, commonly known as the windpipe because it serves as the main conduit for air. The food pipe is the esophagus.

The palate (specifically the hard and soft palate) forms the roof of the mouth and the floor of the nasal cavity, effectively separating the two. Epiglottis and larynx are involved in swallowing and voice production.

The epiglottis is a flap of cartilage that covers the glottis during swallowing to prevent food or liquid from entering the trachea. The other options are parts of the respiratory tract but do not serve this protective function.

The pharynx is the muscular tube that connects the back of the mouth and nose to the larynx and esophagus. While the larynx is also in this region, the pharynx is the broader structure located between the tongue and the larynx/trachea area.

The upper respiratory tract includes the structures from the nose down to the larynx. The trachea marks the beginning of the lower respiratory tract.

The pharynx serves as a common pathway for both air (from the nose) and food/water (from the mouth).

Cilia are tiny, hair-like structures that line the nasal cavity and respiratory tract, helping to move mucus and trapped particles out of the airways.

It is a specialised to connect and anchor various body organs. It can connect bones to each other, muscles to bones, bind tissues and give support to various parts of body by forming packing around organs so that they do not get displaced by body movements.

It is the simplest tissue and is the protective tissue of the body. The cells of the tissue are tightly packed and it forms a continuous sheet. It covers most of the organs and cavities within the body. It also forms a barrier to keep different body systems separate. The skin and lining of the buccal cavity, blood vessels, alveoli and kidney tubules are made of epithelial tissue.

It is the simplest tissue and is the protective tissue of the body. The cells of the tissue are tightly packed and it forms a continuous sheet. It covers most of the organs and cavities within the body. It also forms a barrier to keep different body systems separate. The skin and lining of the buccal cavity, blood vessels, alveoli and kidney tubules are made of epithelial tissue.

It is a specialised to connect and anchor various body organs. It can connect bones to each other, muscles to bones, bind tissues and give support to various parts of body by forming packing around organs so that they do not get displaced by body movements.Its main function are : 1.Binding 2.Supporting 3.Packing.