3 functions of muscle tissue. 1) movement a. of whole body or body parts (skeletal) b. of substances w/in body (cardiac-pumps blood, smooth-substances move through hollow organs) 2) heat production (mostly skeletal) 3) maintain posture and stabilize joints (skeletal).
Human embryonic stem cells in cell culture. Pluripotent: Embryonic stem cells are able to develop into any type of cell, excepting those of the placenta. Only embryonic stem cells of the morula are totipotent: able to develop into any type of cell, including those of the placenta. Embryonic stem cells (ES cells) are pluripotent stem cells derived from the inner cell mass of a blastocyst, an early-stage preimplantation embryo. Human embryos reach the blastocyst stage 4â5 days post fertilization, at which time they consist of 50â150 cells.
Stem cells have the remarkable potential to develop into many different cell types in the body. When a stem cell divides, it can remain a stem cell or become another type of cell with a more specialized function, such as a skin cell.There are two types of stem cells, embryonic and adult. Embryonic stem cells are exogenous in that they are harvested from outside sources, namely, fertilized human eggs.. There is controversy surrounding the use of stem cells, as some experts say that any product that claims to affect the growth of stem cells or the replication process is potentially dangerous, as it may lead to out-of-control replication or mutation.