Basic Tissue types and How They Form Flashcards
the four tissue types are
epithelial, connective, muscle, nervous
what is the scientific name when the developing embryo develops into a ball of cells?
morula
what is the scientific name of the fluid-filled cavity inside a morula that occurs as the result of blastulation?
blastocyst
call that can differentiate into any cell of the body are called
totipotent
what body system is the first to begin developing in an embryo?
nervous system
what is the key thing that governs susceptibility of an embryo to the effects of a teratogen?
stage of development
what are the 3 germ layers?
ectoderm, mesoderm, endoderm
In sheep, gastrulation begins to happen in the second week of embryonic development. If ingested by theewe (female sheep) in the second week of pregnancy, this plant disrupts cell signaling. In particular, the ectoderm is differentiating at this stage of gastrulation.What types of tissues do you think would be affected by disruption of ectoderm development?
epidermis, hair, nails, enamel of teeth, brain, spinal cord, nerves, eyes
If the teratogen was eaten slightly later in the pregnancy, the endoderm in particular is undergoing a rapid period of differentiation. What tissues would be affected by disruption of endoderm development?
lining of the GI tract, lungs, bladder, liver, pancreas
If the teratogen was eaten even later, the various mesoderm derivatives are beginning to form into their respective tissues. What tissues would be affected by disruption of the mesoderm?
muscle, bone, connective tissue, kidneys, gonads, blood vessels, blood cells
the morula stage of embryonic development is where the embryo is
a solid ball of cells
true or false: the zygote is a ball of cells that is the stage that is common used for embryo transfer in cattle
false, its the morula or blastocyst
as an embryo develops, the formation of a multilayers structure from a single-layered disc is known as what?
gastrulation
the CNS arises from which of the following?
neural tube
What is a totipotent cell?
a cell that can differentiate into any of the 3 germ lines
