鸭嘴兽是从壳里诞生的吗，请问鸭嘴兽身上哺乳

　　鸭嘴兽是从壳里诞生的吗，请问鸭嘴兽身上哺乳动物的基本特征有什么？

　　据和记百科网站「水洗晴空」消息，近日，鸭嘴兽是从壳里诞生的吗，请问鸭嘴兽身上哺乳动物的基本特征有什么？引发热议，鸭嘴兽是从壳里诞生的吗同样引起许多争议，对此众网友各抒己见。但到底是怎么回事呢？和记百科为您解答。

鸭嘴兽身上哺乳动物的基本特征有什么

　　鸭嘴兽身上哺乳动物的基本特征有，体表有毛、体腔中有膈、幼仔以母兽的乳汁为食、肺呼吸、恒温。但是又具有与爬行动物相似的特征，卵生，即幼仔是由卵孵化出来的，而不像其他哺乳动物般直接由母体分娩产出。

　　哺乳动物的特征：

　　哺乳动物的主要特征是身体的表面有被毛，使用肺呼吸，大脑比较发达。身体一般分头、颈、躯干、四肢和尾五个部分。用肺呼吸，体温恒定，是恒温动物。牙齿分化为门齿、犬齿和颊齿。哺乳和胎生是哺乳动物最显著的特征。胚胎在母体里发育，母兽直接产出胎儿，母兽都有乳腺，能分泌乳汁哺育胎儿。

鸭嘴兽是从壳里诞生的吗

　　鸭嘴兽身上最奇特的地方便是它兼并卵生动物与哺乳动物的特性。鸭嘴兽靠"下蛋"来繁衍后代，小鸭嘴兽在被母亲孵化后会从蛋中破壳而出。

　　【英文介绍/For English】：

　　The basic characteristics of mammals on the platypus are hair on the body surface, a diaphragm in the body cavity, the young feed on the milk of the mother beast, lung breathing, and constant temperature. However, it has similar characteristics to reptiles, oviparous, that is, the young are hatched from eggs, rather than directly delivered by the mother like other mammals.

　　Features of Mammals:

　　The main characteristics of mammals are that the surface of the body is covered with hair, the use of lungs to breathe, and the brain is relatively developed. The body is generally divided into five parts: head, neck, trunk, limbs and tail. It breathes with lungs, has a constant body temperature, and is a warm-blooded animal. Teeth are differentiated into incisors, canines and cheek teeth. Lactation and viviparity are the most distinctive features of mammals. The embryo develops in the mothers body, the mother beast directly produces the fetus, and the mother beast has mammary glands, which can secrete milk to feed the fetus.