8º ANO - UNIDADE 7 – REPRODUÇÃO SEXUAL / ATIVIDADE 1 (pág. 198 a 213)

Nome do aluno: _____________________________________________________Data: _____/_____/2016

Reflita:

- Todos os seres vivos se reproduzem?

- Qual é a importância da reprodução para uma espécie?

- Todos os seres vivos se reproduzem da mesma forma?

- As pessoas de uma mesma família são semelhantes. Por quê?

1) O que são gônadas? Diferencie gônada masculina e feminina.

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2) O que são gametas? Quais são os gametas masculinos e femininos?

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3) O que é a próstata e qual a sua função?

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4) O Sistema Genital Masculino é composto por quais estruturas?

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5) Os espermatozoides são formados por duas partes: cabeça e cauda. Qual a função dessas estruturas?

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6) O Sistema Genital Feminino é composto por quais estruturas?

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7) A quantidade de gametas produzidos pelo homem é a mesma do que a mulher? Explique.

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8) O que é a menstruação e por que ela acontece?

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9) O que são métodos contraceptivos e qual a importância deles?

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10) O que são DSTs? Cite pelo menos 3 exemplos.

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11) Todos os métodos contraceptivos também protegem contra as DSTs? Cite quais possuem esta função.

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12) Como acontece a fecundação? Explique.

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13) Para que a fecundação ocorra, basta haver relação sexual entre um homem e uma mulher. Esta afirmação está

correta? Por quê?

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14) Diferencie óvulo, zigoto e embrião.

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15) O que é a placenta e a bolsa amniótica? Qual é a função delas?

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16) A gestação, na espécie humana, é de quanto tempo?

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17) Pesquise como são formados os gêmeos idênticos, gêmeos fraternos e trigêmeos. Descreva.

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