can anyone give me notes of tissues
Answers
Answer:
Explanation:
1. Plant tissues- On the basis of dividing capacity, plant tissues are of two types-
(a) Meristematic tissue (b) Permanent tissue
(a) Meristematic tissue- It consists of actively dividing cells. Meristematic tissues have three types.
• Apical meristem- present at the growing tips of stems and roots and helps in increasing the length of stem and roots • Intercalary meristem- Present at the base of the leaves. It is required for longitudinal growth of plants. • Lateral meristem- present on the lateral side of stem and roots and helps to increase the length of stem and roots.
(b) Permanent tissue- It is formed from the meristematic tissues, the cells in this tissue lose the ability to divide. They are further divided into –
• Parenchyma- It is composed of unspecialized living cells with relatively thin cell walls, intercellular space, present in soft part of the plants. • Collenchyma- Composed of living and elongated cells with cell walls irregularly thickened at the corners. There is no inter-cellular space. It helps in bending of leaves and stems. • Sclerenchyma- It is composed of long narrow, thick-walled cells. It is made of dead cells and there are no inter-cellular cells. • Complex permanent tissue- It is made up of more than one type of cells.
2. Animal tissues- Animal tisues are divided into four types based on the functions performed by them.
(a) Epithelial tissues- They form the covering of the external surfaces, internal cavities and organs of the animal body. These are various types of epithelial tissues- • Simple squamous epithelium • Cuboidal epithelium • Columnar epithelium
(b) Connective tissues- They connect various organs of the body. They are divided into:- • Areolar tissue • Adipose tissue • Dense regular connective tissue • Skeletal tissue
(c) Muscular tissue- Muscular tissue provides movement to the body. They are divided into three types: • Striated/skeletal/voluntary muscles • Smooth/involuntary muscles • Cardiac muscles
(d) Nervous tissue- These are present in brain, spinal cord and nerves. Neurons are cells of nervous tissue which consist of a cell body, axon and dendrite.
Tissue are group of cells which perform different functions to ensure the better compatibility of the life. there are many tissues present in our body. Some are connective tissue. muscular tissue, cardiac muscle tissue, ect. the tissues in plants and animals are differ from each other. tissue form the organs to facilitate the function of the body.