According to origin, connective tissue is divided into three parts.
(i) Promeristem: The dividing tissue that originates from the root and apical region of the plant is called promeristem or primitive dividing tissue. It is located at the root and apex of the plant. The cells of this tissue are small, immature, vacuolated and have thin cell walls. The first growth of plants starts from this region. It is divided into different layers and forms different organs.
(ii) Primary meristem: The dividing tissue that originates in the embryonic stage of the plant is called primary meristem. It arises from early dividing tissue. This tissue is capable of dividing forever. It is located at the tip of the root, stem and branch, in the middle and at the periphery of the stem. It never becomes permanent tissue. It increases the length of the plant. Eg- fascicular cambium.
(iii) Secondary meristem: The dividing tissue that originates from the permanent tissue is called secondary meristem. This tissue is located in phellogen or cork cambium, between phases, between xylem and phloem, between two vascular bundles and in cortex. Secondary division tissue increases plant vigor. Heals plant wounds. Eg – cork cambium, interfascicular cambium etc.

1. According to origin: According to origin, connective tissue is divided into three parts.
(i) Promeristem: The dividing tissue that originates from the root and apical region of the plant is called promeristem or primitive dividing tissue. It is located at the root and apex of the plant. The cells of this tissue are small, immature, vacuolated and have thin cell walls. The first growth of plants starts from this region. It is divided into different layers and forms different organs.
(ii) Primary meristem: The dividing tissue that originates in the embryonic stage of the plant is called primary meristem. It arises from early dividing tissue. This tissue is capable of dividing forever. It is located at the tip of the root, stem and branch, in the middle and at the periphery of the stem. It never becomes permanent tissue. It increases the length of the plant. Eg- fascicular cambium.
(iii) Secondary meristem: The dividing tissue that originates from the permanent tissue is called secondary meristem. This tissue is located in phellogen or cork cambium, between phases, between xylem and phloem, between two vascular bundles and in cortex. Secondary division tissue increases plant vigor. Heals plant wounds. Eg – cork cambium, interfascicular cambium etc.

2. According to cell division: According to cell division, dividing tissue is divided into three parts.
(i) Rib meristem: The dividing tissue which divides at one level is called Rib meristem. It is called rib dividing tissue because it looks like the rib of the chest. For example, spinal cord.
(ii) Plate meristem: The dividing tissue which divides into two layers is called plate meristem. Cells are single-layered and plate-like, so called squamous tissue. Division of plate dividing tissue results in flattened, elongated plant organs that increase in length and width. It increases the volume and area of plant organs. For example, the bark, leaves, etc.
(iii) Mass meristem: The dividing tissue which divides at all levels is called mass dividing tissue. It is randomly arranged to form cell islands. It increases the volume or density of plant organs. For example, embryo, follicle, endosperm, cortex, marrow etc.

3. According to location: Scientist Haberland (1914) divided dividing tissue into three parts according to location.
(i) Apical meristem: The dividing tissue located at the apex of the plant root and stem is called apical meristem. These are primary dividing tissues. It divides and causes the plant to grow in length. So the dividing tissue at the top is called growing point.
(ii) Lateral meristem: The dividing tissue which is located longitudinally along the sides of the root and stem of the plant is called lateral meristem. It causes secondary growth. It increases the height or width of the plant. Eg- Cork cambium, Interspherical cambium etc.
(iii) Intercalary meristem: The dividing tissue located between two permanent tissues is called intercalary dividing tissue. They are primary dividing tissue. It is present in the leaves, midrib, apex and flower buds of plants. Plants include rice, wheat, bamboo, grasses, horsetail (Equigitum), pine etc.
4. According to function: Scientist Haberland (1914) divided dividing tissue into three parts according to function.
(i) Protoderm: The dividing tissue that forms the skin of plants is called protoderm. Cells of this tissue form plant skin by atrial division (except bot, rubber). It forms the epiboema of the root.
(ii) Procambium: The dividing tissue that forms xylem, phloem and cambium of plants is called procambium. It is scattered in the stems of monocotyledonous plants and in ring form in the stems of dicotyledonous plants. It forms transport tissue or vascular bundles. In many plants it forms a cycle or pericycle.
(iii) Ground meristem: The dividing tissue that gives rise to cortex, pericycle, pith and medulla is called ground meristem.

The dividing zone of the plant contains the most dividing tissue. The dividing tissue is located at the apex of the root and stem. Plant leaves, flowers, buds, stem, midrib, periphery of the stem etc. have a lot of dividing tissue. The plant cortex consists of cork cambium, fascicular cambium in vascular bundles and interfascicular cambium between two vascular bundles.

1. Cells are capable of division and are in proliferative zones.
2. The cells are alive, symmetrical and small.
3. Cells have a higher metabolic rate.
4. The cells are densely packed and have no intercellular spaces.
5. Separable tissue does not have a cell cavity.
6. Cells do not store food, secretions or waste products.
7. The cytoplasm of the cell is dense.
8. Cell nuclei are relatively large.
9. Their cell walls are thin and composed of cellulose.
10. Cells are small in size and equal in length and width.
11. Cells are oblong, oval, pentagonal or hexagonal.
12. Their plastids are in the pro-plastid state.
13. Cells of dividing tissue fill the wound by mitosis division.

A tissue whose cells are capable of dividing is called a dividing tissue. The cells of dividing tissue are called meristemetic cells. Meristem is another name for dividing tissue. Eg cambium, cork cambium, interfascicular cambium etc.

A group of similar or dissimilar cells produced from the same source and collectively performing similar functions is called a tissue or tissue. Tissues are the groups of cells that make up each part of a plant. Different parts of plants are made up of different types of tissues. When the cells of a plant organ divide transversely, it is anticlinal in nature. If the cells divide in parallel, they are periclinal in nature. French scientist M. F. X. Bichart first used the term tissue.
Tissues are divided into two parts according to cell division. Meristem and permanent tissue.

A sprained patient must RICE.
RICE = Rest + Ice + Compression + Elevation
1. The sprained limb should be kept elevated.
2. Complete rest with crepe bandage for 2-3 weeks.
3. The sprained limb cannot be moved.
4. No massage can be used.
5. Ice the sprained area every 30 minutes for the first two days to reduce pain.
6. Applying warm compresses every two days to increase blood circulation.
7. Temporary plaster can be applied.
8. The first week should be walked with a stick or crutches.
9. An extra elastic bandage on the leg is good when walking.
10. The patient should take Aspirin or Diclofenac tablets on a full stomach to reduce pain.

1. Abnormal swelling.
2. severe pain
3. Pain increases with limb movement.
4. Fibrous damage occurs at the site of injury.
5. The affected area turns black.
6. Bleeding occurs when the ligament tears.
7. Muscle spasms occur.
8. Difficulty walking.

Abnormal force applied to the joint causes the ligament to overstretch and sprain the bone.

Sprain is the condition that occurs when the fibers or nerves around the bone joint are damaged due to injury.