In an orb-web-weaving spider, you can find seven types of silk glands, and what I have depicted here in this picture, let's start at the one o'clock position, there's tubuliform silk glands, which are used to make the outer silk of an egg sac.
在一只圆蛛体内 你能找到七种不同的丝腺 而我在这张图中已把它们一一描绘出来 我们从一点的位置开始 这里是管状丝腺 用于制作卵囊的外部