Question

Distinguish between

(a) Simple epithelium and compound epithelium

(b) Cardiac muscle and striated muscle

(c) Dense regular and dense irregular connective tissues

(d) Adipose and blood tissues

(e) Simple gland and compound gland

Answer 1

(a) The difference between simple epithelium and compound epithelium are given below:

Simple Epithelium	Compound Epithelium
1. A single layer of epithelial cells resting on a basement membrane are called as simple epithelium.	1. It consists of more than one layer. The innermost layer of cells is arranged on the basement membrane.
2. They are present in the secretory and absorptive surface.	2. They are not involved in secretory or absorptive functions.
3. It is not protective as it can't resist the damages due to mechanical or chemical abrasions.	3. Because of the multi-layered structure, they help in the protection of tissues below them.
4. Squamous, cubical, columnar epithelium, etc.	4. They may be transitional or stratified, i.e., stratified squamous epithelium.

(b) The difference between Cardiac Muscle and Striated Muscle are given below :

Cardiac Muscle	Striated Muscle
1. Heart muscles are known as cardiac muscle.	1. Striated muscle is otherwise called as striped or skeletal muscle as it is attached to the skeleton.
2. These are short cells attached the head to tail.	2. These are long cells, present in bundles, enclosed in the sarcolemma.
3. Mitochondria and glycogen are more abundant.	3. Comparatively less.
4. Faint but light and dark bands.	4. Prominent regular strips of light and dark bands.
5. Cells are branched and connected to next cells by intercalated disc.	5. Unbranched cells without in interconnections.
6. It is involuntary muscle.	6. It is voluntary muscle.

(c) The difference between dense regular and dense irregular connective tissue are given below:

Dense regular connective tissue	Dense irregular connective tissue
1. In dense regular connective tissues, collagen fibres are present in rows between parallel bundles of fibres.	1. In dense irregular connective tissues, fibres are arranged irregularly.
2. They are present in tendons and ligaments.	2. They are present in the skin.

(d) The difference between adipose and blood tissue are given below:

Adipose tissue	Blood tissue
1. It is composed of collagen fibres, elastin fibres, fibroblasts, macrophages, and adipocytes.	1. It is composed of RBCs, WBCs, platelets, and plasma.
2. It helps in the transportation of food, wastes, gases, and hormones.	2. It helps in the synthesis, storage, and metabolism of fats.
3. It is present beneath the skin.	3. It is present in the blood vessels.

(e) The difference between simple gland and compound gland are given below:

Simple Gland	Compound Gland
1. Gland without branching duct is called as a simple gland.	1. Gland with branched ducts called as the compound gland.
2. The glandular cells are arranged in the form of tubes or sacs.	2. The glandular cells are present in separate pockets which discharge their contents in an in the duct.
3. Sweat gland, oil gland.	3. Duodenal glands, pancreas, etc.