Overview of functions of cellular organelles
By: Lillian Mugwe
All living things have cells which have a diameter of about 10 µm. They comprise of different structures called organelles which perform specific functions within the cell. Cell Membrane Also known as the plasma membrane or the plasmalema. It encloses the cell contents separating...
Blue-green algae shows the evolution of multicellularity is not linear
By: Alicia M Prater PhD
A major step in the evolution of life forms was the progression from single-celled to multi-celled organisms, which is estimated to have occurred approximately 2 billion years ago. One organism that straddles this line is blue-green algae, or cyanobacteria. Cyanobacteria are photosynthetic bacteria that usually...
By: Oluwasegun P. Gbolagun
Cells are the fundamental units of life. Basic life processes such as nutrition, excretion, respiration and reproduction are carried out by the cells. All living things are composed of cells in varying degrees, shapes and sizes. Organisms such as bacteria and protozoa are unicellular, that...
By: Ann Major
As terminology for parts of a cell are quite extensive, it would be helpful to refer to a diagram for reinforcement. Doing a virtual walk-through, from outside to the inside of a cell would help one become familiar with various functions and operations that cell...
The structure and function of neurons
By: Alicia M Prater PhD
Neurons are nerve cells, making up the functional core of the peripheral and central nervous systems. The function of neurons is to carry electrical signals, where they carry them to and from depends on the location of the neuron in the nervous system. Basic neuron...
The role of mitochondria in the cell
By: Kathy Downey
Every organism is made of cells, and every cell contains organelles. These are the “little organs” that control the life functions of that cell. Mitochondria are organelles that are vitally important to the functioning of a cell, and therefore to life itself. If the...
Mitochondria defined
By: Dr. Bryan Katz
Mitochondria are organelles found exclusively in eukaryotic cells, i.e. protozoa, fungi, plants, and animals. The term 'mitochondrion' is derived from a Greek word meaning thread. This accurately describes their appearance in the light microscope, as barely visible thread like structures. Following the invention of...
By: Ali Weetly
Mitosis is a process in biology where eukaryotic cells and their nuclei divide to produce two cells, identical to the first. There are a few steps in this process. Mitosis is an important part of biology and is the way that reproductive cells can divide...
An overview of human embryo development step-by-step
By: Srikanth Radhakrishna
The term embryo is derived from a Greek word which means "That which grows". An embryo is defined as "The developing organism from fertilization to the end of the eighth week". The development process of an embryo in its mother's womb is a wonder of...
An overview of the toll-like receptors
By: Maffew James
The human body is a complex machine, and when it suffers from an attack on its system by pathogenic microbes such as bacteria, it acts accordingly to find and eliminate the source of the infection and restore function back to normal. The way in which...

 

1 27 28 29 30 31 33