(i) They act as supporting and packing tissue as they are found between visceral organs.
(ii) They help in the repair of tissue.

(i) Skin - Striated squamous epithelium
(ii) Bark of tree - Cork (protective tissue)
(iii) Bone - Connective tissue
(iv) Lining of kidney tubule - Cuboidal epithelium
(v) Vascular bundle - Conducting tissue (xylem and phloem).

(i) Cardiac muscle cells are cylindrical branched and uninucleate.
(ii) The show rhythmic contraction and relaxation throughout life.
(iii) They are involuntary muscles.

Fibrous connective tissue. It is of two types:
(i) The white fibrous connective tissue,
(ii) Yellow fibrous connective tissue.
(i) The white fibrous connective tissue consists of white, nonelastic, unbranched fibres which unite to form bundles called tendons. Tendons are strong, tough and smooth, rope-like structures that serve to attach muscles with the bones.
(ii) The yellow fibrous connective tissue. It also consists of fibres which are fine thread-like structures. These fibres are quite elastic. Like white elastic fibres, these fibres also form cords called ligaments. These ligaments connect two bones.

Voluntary muscles are those which are directly under control of our will e.g., skeletal muscle. They work or contract on our command. Involuntary muscles are not under the command of our will. We cannot control contraction and relaxation of these muscles. They are of two types-smooth muscles and cardiac muscles. Smooth muscles are found in stomach, intestine, iris of eye, in ureters and in the bronchi of lungs. Another type of involuntary muscles that is, cardiac muscles are found in heart.

Epithelial Tissue. Epithelial tissue forms covering of entire surface of the body and lines the internal organs. Because of this epithelial tissue is also called protective tissue. It also forms a barrier to keep different body system separate. In this tissue cells are closely associated and arranged on a very thin extracellular fibrous basement membrane. Epithelial tissue may be composed of one (simple epithelium) or more layers of cells (compound epithelium). The skin, lining of mouth and alimentary canal, lung alveoli etc. are made of epithelial tissues.

Phloem consists of following four elements:
(i) Sieve tubes
(ii) Companion cells
(iii) Phloem parenchyma
(iv) Phloem fibres.
The most important element of phloem is sieve tubes because they translocate food materials from leaves to other parts of plant.

Major Functions of Stomata:
(i) Stomata are essential for exchange of gases-oxygen and carbon dioxide between the plant and the atmosphere.
(ii) Normally, plants remove excessive water in the form of vapour through stomata. This process is called Transpiration.

Collenchyma. The cells in this type of tissue are living, elongated and thickened with cellulose at the corners. There is very little intercellular space. This tissue provides flexibility and mechanical support to plants. This tissue is found in hypodermis of stems and leaf stalks.

Functions of the Parenchyma.
(i) They store food.
(ii) They provide temporary support by retaining the turgid condition of cells.
(iii) Chlorenchyma containing chloroplasts prepare food through photosynthesis.
(iv) In aquatic plants, aerenchyma gives buoyancy to plants and hence they can float easily.

(i) This tissue consists of actively dividing cells.
(ii) This tissue is present in growing regions of plants.
(iii) In this tissue, cells are packed closely without intercellular spaces.
(iv) Cells of this tissue have thin cell walls, dense cytoplasm and prominent nuclei.

Meristematic cells have:
(i) Thin cell walls.
(ii) Abundant or dense cytoplasm and single large nucleus.
(iii) Spherical, oval, polygonal or rectangular shape.
(iv) No intercellular spaces between them.
(v) Either no vacuoles at all or a few vacuoles.