Learn More - Unit 1

Unit No. 1 - Living Tissues

1) What are Tissues?

A group of cells with a common origin that has been modified to perform a specific function in the body is known as a tissue.

2) Two types of tissues based on Cell Division?

Meristematic Tissues
Permanent Tissues

3) What are Meristematic Tissues?

The tissues with cells that divide actively by mitosis to produce new cells are called meristematic tissues.

4) Features of meristematic tissues

This tissue consists of small sized living cells.
Intercellular Spaces are Not Prominent.
Distinct nucleas in each cell.
Large number of Mitochondria are present.

#1 DiD yoU kNoW ?

Meristematic Tissues contain a large number of Mitochondria in order to release energy more effectively for active mitosis. Energy for the metabollic activities of the cell is provided by the organelle - Mitochondria!

5) Types of Permanent Tissues

Simple Permanent Tissues
Complex Permanent Tissues

6) What are Simple and Complex Permanent Tissues?

If the Tissues are composed of similar type of Tissues, they are known as Simple Permanent Tissues, otherwise If the Tissues are composed of different types of Tissues, they are known as Complex Permanent Tissues.

7) Functions of Simple Permanent Tissues

Parenchyma	Collenchyma	Sclerenchyma
Photosynthesis	Support	Provide support to the plant body
Food Storage	Photosynthesis	-
Storage of water	-	-
Providing support	-	-

8) What are the types of Complex permanent tissues?

Xylem Tissue
Phloem Tissue

9) Functions of Complex Permanent Tissues

Xylem Tissue - Transporting Water and Minerals throughout the plant, Providing mechanical support to the plant body.
Phloem Tissue - Translocation.

10) What are the Main Types of Animal Tissues?

Epithelial Tissue
Connective Tissue
Muscle Tissue
Nervous Tissue

11) Functions of Epithelial Tissues

Lining up of free surfaces and protection.
Absorptive function.
Perception of stimuli.
Secretory function.
Filtering.

12) Functions of Blood Tissues as a Connective Tissue

Transportation of materials - Nutrients, respiratory gases, excretory materials and hormones are transported to the relevant organs.
Protection - White blood cells destroy foreign bodies (Microbes) by phagocytosis and by producing antibodies.
Maintenance of homeostasis.

#2 DiD yoU kNoW ?

Blood is a type of Connective Tissue found in the human body which is NOT Secreted by the Blood Cells itself. This tissue is known as "Plasma" and helps in proper coordination within the Human body!

13) Types of Muscle Tissues

Smooth Muscle Tissue
Skeletal Muscle Tissue
Cardiac Muscle Tissue

14) Features of Different Muscle Tissues

Smooth Muscle Tissues	Skeletal Muscle Tissues	Cardiac Muscle Tissues
Spindle Shaped, and unbranched.	Long, Cylindrical, Unbranched cells.	Short cells with Intercalated discs.
Uninucleate, and no striations present.	Multinucleate cells with striations.	Uninucleate cells with striations.
Do NOT become fatigue quickly.	Becomes fatigue easily.	NEVER become fatigue.
Involuntarily controlled.	Voluntarily controlled.	Involuntarily controlled.

#3 DiD yoU kNoW ?

Cardiac Muscle Tissues are the ONLY Tissues found within the Human Body, that NEVER becomes fatigue! If for some reason, they become fatigue, the Human would ultimately DIE as Blood stops flowing to the body's organs!

15) What is the function of a Neuron?

The function of the neuron is to receive the information from the receptors (eye, ear, nose tongue, skin) or another neuron and to transmit them to the effector (muscles) or to another neuron.

16) Types of Neurons

Sensory Neuron
Inter Neuron
Motor Neuron