A secondary headache is a symptom of a disease that can activate the pain-sensitive nerves of the head. Any number of conditions â varying greatly in severity â may cause secondary headaches. Possible causes of secondary headaches include: Acute sinusitis. Arterial tears (carotid or vertebral dissections)
The fallopian tube is a crucial structure involved in successful reproduction and, like with all structures in the human body, sometimes problems occur that hinder the structure's ability to function properly.
This helps keep them alive in their habitats. Most sponges are both male and female. In sexual reproduction, they may play either role. The âmaleâ sponge would release sperm into the water, which would travel and then enter a âfemaleâ sponge.After fertilization in the sponge, a larva is released into the water.n sexual reproduction, they may play either role. The âmaleâ sponge would release sperm into the water, which would travel and then enter a âfemaleâ sponge. After fertilization in the sponge, a larva is released into the water.