KINESIOL 1Y03 Lecture Notes - Lecture 3: Smooth Muscle Tissue, Meiosis, Prostaglandin
20 Apr 2016
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Document Summary
1% of sperm out of 200 million actually get thru the cervix due to ph and secretions that kill sperms. Secretions cause contractions in the uterus to help propel sperm to ampullar region of uterine tube (help conception processes): prostaglandin in male semen, oxytocin in females. Oocyte can only be fertilized within 24 hours. Healthy sperm cells that get thru have all their chromosomes (23) and generally fully- Sperm can survive anywhere between 36hrs-6days but most die in first 24 hrs functioning. Single cell > divides > creates layers germ layers: germinal period (first 2 weeks) Germ layers eventually become all of the tissues in the body: embryonic period (end of 2. Organ systems develop nd to end of 8 th week) Prenatal care is very important especially during embryonic period sometimes ppl don"t know theyre pregnant till after! Malformation can happen if uncared for: fetal period.
