2. Go to Canvas, and under the Development Lab in Modules, watch the HHMI video.

Question

2. Go to Canvas, and under the Development Lab in Modules, watch the HHMI video. After fertilization, about how many days until the embryo implants in the uterus? 3. Draw a line connecting the germ layer (left column) with the tissue to which it gives rise (right column). There is more than one match to each germ layer Skeletal system Epidermis Liver Circulatory system Nervous system Reproductive organs Epithelial lining of respiratory system Smooth muscle of the digestive tract Epithelium of the digestive tract Endoderm Mesoderm Ectoderm 4. Below are developmental stages of 6 vertebrate animals Fore-limb Hind-imb bud Sala Fish mander Tortoise Chick Rabbit Man What similarities do you notice in all of these organisms in very early development?

Explanation / Answer

2. The embryo implants in 3-4 days after fertilization.

3. Skeletal system : Mesoderm

Epidermis : Ectoderm

Liver : Endoderm

Circulatory system : Mesoderm

Nervous system : Ectoderm

Reproductive organs : Mesoderm

Epithelial lining of respiratory system : Endoderm

Smooth muscle of the digestive system : Mesoderm

Epithelium of the digestive tract : Endoderm

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