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.
In most cases, yes. The hollow blastocystâwhich is where embryonic stem cells come fromâcontains a cluster of 20-30 cells called the inner cell mass. These are the cells that become embryonic stem cells in a lab dish. The process of extracting these cells destroys the embryo. Donât forget that the embryos were donated from IVF clinics.