How to explain animal cell?

Question

Answer

Answer

“An animal cell is a type of eukaryotic cell that lacks a cell wall and has a true, membrane-bound nucleus along with other cellular organelles.” these cells exhibit the presence of DNA inside the nucleus. They also comprise of other organelles and cellular structures which carry out specific functions necessary for the cell to function properly.

Answer

**Animal Cell: Structure and Functions**

An animal cell is a basic unit of life that is found in all animals. It is a eukaryotic cell, meaning it has a true nucleus and membrane-bound organelles. Animal cells vary in size and shape, but they all have certain structures and functions that are essential for their survival and functioning.

**Cell Membrane:**
The cell membrane is the outermost covering of an animal cell. It is a selectively permeable barrier that controls the movement of substances in and out of the cell. It is composed of a lipid bilayer embedded with proteins and carbohydrates.

**Nucleus:**
The nucleus is the control center of the cell. It contains the genetic material, DNA, which carries the instructions for cell functioning and inheritance. The nucleus is surrounded by a double-layered nuclear membrane, which regulates the movement of molecules in and out of the nucleus.

**Cytoplasm:**
The cytoplasm is a gel-like substance that fills the cell. It is composed of water, salts, and various organic molecules. The cytoplasm houses the organelles and provides a medium for cellular metabolism and biochemical reactions to occur.

**Mitochondria:**
Mitochondria are often referred to as the powerhouses of the cell. They are responsible for generating energy in the form of ATP through cellular respiration. Mitochondria have a double membrane and contain their own DNA.

**Endoplasmic Reticulum:**
The endoplasmic reticulum (ER) is a network of membranous tubules and flattened sacs that extends throughout the cytoplasm. It is involved in the synthesis, folding, and transport of proteins and lipids. The ER can be rough (with ribosomes) or smooth (without ribosomes).

**Golgi Apparatus:**
The Golgi apparatus is a stack of flattened membranous sacs that functions in modifying, sorting, and packaging proteins and lipids for transport within the cell or secretion outside the cell. It is often called the 'post office' of the cell.

**Lysosomes:**
Lysosomes are small vesicles that contain digestive enzymes. They are involved in breaking down waste materials, cellular debris, and foreign substances. Lysosomes play a crucial role in cellular recycling and maintaining the cell's internal environment.

**Centrioles:**
Centrioles are cylindrical structures composed of microtubules. They play a role in cell division by organizing the spindle fibers during mitosis and meiosis. Centrioles are only found in animal cells.

**Conclusion:**
In conclusion, animal cells are complex and highly organized structures that are essential for the functioning of animals. They consist of various organelles, each with specific functions, such as energy production, protein synthesis, and waste disposal. Understanding the structure and functions of animal cells is crucial for comprehending the biology of animals and their physiological processes.

Answer

Animal cells

are typical of the eukaryotic

cell

, enclosed by a plasma membrane and containing a membrane-bound nucleus and organelles. ... The ability to move about by the use of specialized muscle tissues is a hallmark of the

animal

world, though a few

animals

, primarily sponges, do not possess differentiated tissues.

Answer

(1)Animal cells are the basic unit of life in organisms of the kingdom Animalia. They are eukaryotic cells, meaning that they have a true nucleus and specialized structures called organelles that carry out different functions.
(2)A typical structure of an animal cell includes organelles, cytoplasmic structures, cytosol, and cell membrane. Organelles are membrane-bound structures inside the cell and each of them has a distinctive role.

Answer

An animal is made of following components.

Cell membrane or plasma membrane : It forms the limiting boundary of the cell. It encloses the cytoplasm and cell organelles. Its function is to selectively allow the movement of substances into and outside the cell.
Cytoplasm - It a semifluid substance present within the cell membrane. It has various cell organelles and inclusions dispersed in it. The cytoplasm helps in the movement of substance between organelles and to the cell membrane. The movement is regulated by proteins present in the cytoplasm that form the cytoskeleton.
Nucleus - It is the most important organelle of the cell. It consists of genetic material dispersed in the nucleoplasm enclosed by a nuclear envelope. The envelope has multiple pores for exchange of substances between the nucleoplasm and the cytoplasm. It also contains a nucleolus. The major function of the nucleus is to control all the activities of the cell.
Endoplasmic Reticulum : It is a system of single membrane bound tubules called cisternae and vesicles. The ER system may be in continuation with the outer membrane of the nucleus, and is of two types - Rough and Smooth

The RER: Has ribosomes transiently attached to the external surface of membrane and performs the function of protein synthesis.
The SER : Has a smooth external surface with no ribosomes attached to it. Its function is to synthesize fats.

The proteins and fats synthesized by ER are trasported to the Golgi Apparatus in vesicles

5. Golgi apparatus : It also consists of cisternae and vesicles. It receives vesicles from the ER, modifies the fats, proteins and sugars, tags them tranports them to their respective organelles or to the cell membrane to be secreted outside by packing them in vesicles.

6. Mitochondria: It is a sausage shaped double membraned structure. The inner membrane is folded to form cristae, that contains respiratory particles. Mitochondria contains respiratory enzymes for formation of ATP from glucose.

7. Lysosome : They are single membrane bound organelles, containing hydrolytic enzymes. They digest unwanted cellular components and pathogens.

8. Centrosome: Centrosome is a clear space, closer to the nucleus and contains a pair of centrioles. The function of centrioles is formation of spindle fibres and aster during cell division.

Top Courses for Class 10View all

Science Class 10

Social Studies (SST) Class 10

Mathematics (Maths) Class 10

English Grammar Advanced

English Grammar Basic

Top Courses for Class 10

Top Courses for Class 10

Suggested Free Tests

Related Content

About Class 10

Class 10 Study Material

Class 10 All Subjects

NCERT Textbook Solutions

Other Classes

Important Links

Company