Cell Biology Notes
As implantation of the blastocyst occurs, morphologic changes in the embryoblast produce a bilaminar embryonic disc composed of epiblast and hypoblast cells. Epiblast is derived from the inner cell mass … Read more
Simple diffusion definition Simple diffusion is a type of passive transport which, as the name suggests, is simply the movement of solute which occurs when its electrochemical potentials on the … Read more
Within twenty-four hours after fertilization, the zygote initiates a rapid series of mitotic cell divisions called cleavage. These divisions are not accompanied by cell growth, so they subdivide the large … Read more
Chloroplast Morphology Types of pigments Chloroplast Structure A chloroplast consists of three main components. Envelope Stroma Thylakoids Semi-autonomous nature of chloroplast Functions of Chloroplast References
What is a Karyotype? The number and appearance of chromosomes (made up of DNA and supercoiled proteins) in an organism is known as a karyotype. There are 2 kinds of … Read more
Microvilli are small finger-like projections found on cells within the body that help the cells to get nutrition. Microvilli are membrane protuberances that arise from epithelial cells. They are usually … Read more
The preimplantation period of human embryo development is remarkable and characterized by successive changes in terms of genetic control, physiology, and morphology of the embryo. Blastocyst (Greek, blastos= sprout + cystos = cavity) … Read more
A cell wall is an outer rigid semi-elastic supportive and protective layer. It is present around the plasma membrane. It provides mechanical support and helps in maintaining the shape of … Read more
The primary cell and middle lamella never occur in the form of a continuous layer, but many minute apertures through the cells of a tissue maintain cytoplasmic relation with each … Read more
Meiosis definition Meiosis is a type of cell division in sexually reproducing eukaryotes, resulting in four daughter cells (gametes), each of which has half the number of chromosomes as compared … Read more
