First Course in Biology
First Course in Biology
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In our eReader you can find the full English version of the book. Read First Course in Biology Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book First Course in Biology
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- Nil M OF Marchantia.
ties in the receptacle. From the base of each cavity there arises a thick, club-shaped body, the antheridium. Within the anther- idium are formed many sperm -cells which are capa- ble of swimming about in water by means of long lashes or cilia attached to them. When the anther- idium is mature, it bursts and allows the ciliated sperm cells to escape.
The archegoniophores are also elevated on stalks (Fig. 289). Instead of a simple disk, the recepta- cle consists of nine or... more finger-like rays. Along the under side of the rays, between delicately fringed curtains, peculiar flask-like bodies, or arche- gonia, are situated. The archegonia are not visible to the naked eye. They can be studied only with the microscope (x about 400). One of them much magnified is represented in Fig. 292. Its principal parts are the long neck, a, and the rounded venter, b, inclosing a large free cell — the egg-cell.
We have seen that the antheridium at maturity discharges its sperm-cells.
What to read after First Course in Biology?
You can find similar books in the "Read Also" column, or choose other free books by L H Liberty Hyde Bailey to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
- Nil M OF Marchantia.
ties in the receptacle. From the base of each cavity there arises a thick, club-shaped body, the antheridium. Within the anther- idium are formed many sperm -cells which are capa- ble of swimming about in water by means of long lashes or cilia attached to them. When the anther- idium is mature, it bursts and allows the ciliated sperm cells to escape.
The archegoniophores are also elevated on stalks (Fig. 289). Instead of a simple disk, the recepta- cle consists of nine or... more finger-like rays. Along the under side of the rays, between delicately fringed curtains, peculiar flask-like bodies, or arche- gonia, are situated. The archegonia are not visible to the naked eye. They can be studied only with the microscope (x about 400). One of them much magnified is represented in Fig. 292. Its principal parts are the long neck, a, and the rounded venter, b, inclosing a large free cell — the egg-cell.
We have seen that the antheridium at maturity discharges its sperm-cells.
What to read after First Course in Biology?
You can find similar books in the "Read Also" column, or choose other free books by L H Liberty Hyde Bailey to read onlineMoreLess
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