A small organ-like structure present inside the cell is called a cell organelle. It has a particular structural makeup and performs a specific function. Depending upon the presence or absence of membrane, cell organelles can be classified into three categories, namely:
Without membrane: Some cell organelles like ribosomes are not bounded by any membrane. They are present in prokaryotic as well as eukaryotic organisms.
Single membrane-bound: Some organelles are bounded by a single membrane. For example, vacuole, lysosome, Golgi Apparatus, Endoplasmic Reticulum etc. They are present only in a eukaryotic cell.
Double membrane-bound: Cell organelles like mitochondria and chloroplast are double membrane-bound organelles. They are present only in a eukaryotic.Structure and Functions of Cells
Structure and functions of different cell inclusions are as follows-
They provide structure and support, facilitate growth through mitosis, allow passive and active transport, produce energy, create metabolic reactions and aid in reproduction.
In the plant cell cell wall and plastids are present whereas in animal cell they are absent
Animal cells do not have a cell wall composed of a cell membrane. A plant cell is enclosed by a hard/rigid cell wall along with the plasma membrane. The animal cell is enclosed by a thin, flexible plasma membrane. The nucleus is present in the plant cell and lies in one side of the cell.
2. For example, vacuole, lysosome, Golgi Apparatus, Endoplasmic Reticulum etc. They are present only in a eukaryotic cell. They provide structure and support, facilitate growth through mitosis, allow passive and active transport, produce energy, create metabolic reactions and aid in reproduction.
3. Plastids are double membrane-bound organelles found inside plants and some algae, which are primarily responsible for activities related to making and storing food. Many plastids are photosynthetic, but some are not.
Some of the most common plastids include:
Type iix are best known as fast-twitch muscle fibers. these are the muscle fibers primarily responsible for fast, explosive movements like sprinting. however, lack the endurance-boosting ability of slow-twitch fibers and can only be used for short periods of time.