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.
A blastocyst is an embryo which has been left to develop until day 5 or 6 and presents a complex cellular structure formed by approximately 200 cells. The blastocyst phase is the development stage prior to implantation of the embryo in the motherâs uterus. It makes a better selection of embryos possible.