2015新人教版七年级生物下册复习资料
Unit 4: XXX
39.The common ancestor of modern apes and humans is the ancient forest ape.
I。Reproductive System
40.Structure and n of Male and XXX
Male: XXX - produce sperm。XXX
XXX:
Ovaries - produce egg cells。XXX
Uterus - the site of embryonic development。the place where the XXX
Fallopian XXX - the site of n
XXX: XXX。and the XXX numerous sperm。only one can enter the egg cell。The XXX.
The cells in the XXX divide and differentiate。XXX into an embryo。and around 8 weeks after pregnancy。developing into a fetus - beginning to show the form of a human。The fetus lives in the tic fluid。a mi-transparent liquid in the uterus。and obtains the XXX。The waste products。such as carbon xide。XXX.
From the n of the zygote to 38 weeks (266 days)。the XXX。a process called delivery.
41.Physical Changes in Adolescence
1) Rapid increa in height。XXX system。heart。and lung n.
2) Rapid development of reproductive organs: XXX。and girls XXX.
optimalII。Digestive System
XXX Nutrients Needed by the Human Body
There are six types of nutrients: carbohydrates。fats。proteins。water。XXX。and vitamins.
Water: accounts for about 60%-70% of body weight
converter
XXX:
Calcium - Children who lack calcium are prone to rickets (chicken breast。X-shaped or O-shaped legs)。and middle-XXX: milk。etc.
君子之交淡如水英文Phosphorus - Anorexia。anemia。muscle weakness。bone pain
Iron - Iron-deficiency anemia (weakness。dizziness)。XXX: animal liver。spinach
Iodine - XXX。XXX: kelp。aweed。iodized salt
Zinc - Poor growth and development。taste disorders
Vitamin A - Dry skin。night blindness。dry eye dia
Vitamin B1 - Neurosis。beriberi。n。loss of appetite
Vitamin C - Scurvy。decread resistance。XXX: orangesfortune500
Vitamin D - Rickets。XXX: cod liver oil。animal liverian nina
43.n of the Human Digestive System: Digestive Tract and Digestive Glands
Digestive Tract: XXX → Pharynx → Esophagus → XXX → Small Intestine (Duodenum) → Large Intestine → Anus
Digestive Glands:
Salivary Glands - Salivary amyla (XXX)
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Liver - Bile (emulsifies fat into fat particles)
Gastric Glands - Pepsin
Pancreas。Intestinal Glands - XXX。proteins。and fats
44.n of Food
XXX Process of the Three Main Nutrients
Intestinal Juice。Pancreatic Juice搞笑的英文名字
免费英语在线学习Starch Malto_Gluco_Liquid
XXX Small Intestine
Intestinal Juice。Pancreatic Juice。Gastric Juice
Protein Polypeptide Small Intestine__Amino Acid__Stomach
肺内气压胸廓容积缩小、向下向内运动左右径减小
呼气肌肉收缩ptn
收缩—→→
burning什么意思减小肺随着收缩
膈肌松弛→膈顶部上升→胸廓上下径减小
5、肺泡和毛细血管壁很薄，氧气和二氧化碳通过扩散方式交换。
6、肺泡内氧气含量高，毛细血管内二氧化碳含量高，氧气向毛细血管扩散，二氧化碳向肺泡扩散，完成气体交换。
7、呼吸中枢位于脑干，控制呼吸节律和深度。
8、呼吸系统与心血管系统紧密联系，通过氧气和二氧化碳的交换，维持身体的氧合作用和酸碱平衡。
