In a free, unregulated market system, market forces establish equilibrium prices and exchange quantities. While equilibrium conditions may be efficient, it may be true that not everyone is satisfied

有关概念 一、交配体制（mating system）：确定亲本间交配组合的一系列规则方法。 二、选配（mating）：人为确定个体间交配的策略

1. Components ---ovary: produce ovum secrete female sex hormones ---oviduct: duct for fertilized ovum(zygote) passing through place where fertilization takes place ---uterus: organ where the fetus grow up ---vagina

1. Components: ---testis: produce the male germ cells- gametes(sperm) produce androgen-testosterone ---gernital ducts: store and conduct the sperm epididymis ductus deferens ejaculatory duct

1. Components ---nose ---pharynx ---larynx ---trachea ---bronchi ---lung

1. Components: ---small gland or endocrine cell: islet of pancreas and corpus luteum ---endocrine gland: Thyroid gland Parathyroid gland Adrenal gland Pituitary gland(hypophysis) Pineal body

Appendix D Coordinate systems Rectangular coordinate system Coordinate variables

子宫内膜增生症 ( endometrial hyperplasia ) 子宫内膜的周期性变化与卵巢性激素的关系: 雌激素使之增生,孕激素使之分泌病因发病机制：体内雌激素水平持续增高,促使子宫内膜过度增生

Ratio analysis Du Pont system Effects of improving ratios Limitations of ratio analysis Qualitative factors

Overview Ground Systems Support the space segment Command and Control Monitor spacecraft health Track Calculate spacecraft attitude