The prostate gland ,the bulbo-urethral gland and the seminal vesciles are the glands which provide secretions that nourish and protect sperm cells.
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oxygen
Your cells need oxygen to convert the nutrients you eat into energy for your body. In the process of making that energy, some waste products are produced. One of the main waste products is a gas called carbon dioxide.
Scavengers are meat eaters that eat dead animals
This can be possible because we no longer need to use a large hose and spray water on the roads and let the dirty water drain away back into seas and rivers and create water pollution. However, this methods requires a large amount of labor and time.
