BIOL-3030 Chapter 4: Vertebrate Organ Systems
Document Summary
Gametes and sex cells don"t develop from mesoderm but everything around them does. Primary function: get rid of toxic elements, keep the good stuff in balance. Nephrons do this and they group together to create kidneys. Filtration of the blood how the wastes get out. The tubes allow water and salts to diffuse out. As you pull the water out, you are left with concentrated nasty waste. Kidney comes from intermediate mesoderm which extends the length of the body. Reproduction and reproduction types (excretory system and reproduction system closely related) Internal sperm goes into female delayed fertilization can be delayed until external environment is advantageous not all vertebrates breed all year round. R-strategists: lots of tiny young, little parental care. K-strategists: fewer large young, some to lots of parental care. Humans (including professors): are k-strategists and have altricial young. One channel where neurons are being sent opposite ways at the same time. Myelin sheath insulate most of the axons.
