The parathyroid glands are small endocrine glands in the neck of humans and other tetrapods that produce parathyroid hormone. Humans usually have four parathyroid glands, variably located on the back of the thyroid gland, although considerable variation exists.Parathyroid hormone and calcitonin (one of the hormones made by the thyroid gland) have key roles in regulating the amount of calcium in the blood and within the bones.he parathyroid glands are two pairs of glands usually positioned behind the left and right lobes of the thyroid. Each gland is a yellowish-brown flat ovoid that resembles a lentil seed, usually about 6 mm long and 3 to 4 mm wide, and 1 to 2 mm anteroposteriorly. There are typically four parathyroid glands.
The life cycle of the ladybug is between four to six weeks. In the spring the adults lay up to three hundred eggs in an aphid colony. The eggs hatch in two to five days. The newly hatched larvae feed on aphids for up to three weeks, and then they enter the pupa stage.The adult ladybug emerges about a week later. However, they usually do not have their spots for their first 24 hours of adulthood.There may be as many as six generations of ladybugs hatched in a year.he life cycle of the ladybug is between four to six weeks. In the spring the adults lay up to three hundred eggs in an aphid colony. The eggs hatch in two to five days. The newly hatched larvae feed on aphids for up to three weeks, and then they enter the pupa stage.
Four to seven weeks is the ladybug [ Coccinellidae family] gestation. There may be one or two offspring, depending upon the particular ladybug type. There may be as many as 1,000 eggs produced over the ladybug's two to three year lifespan.adybugs, or ladybird beetles, got their name about 500 years ago in Europe. It seems that farmers were having big trouble with insects called aphids (AY-fids). The aphids wer â¦ e sucking the juices from the farmers' grape vines. So the farmers prayed to the Virgin Mary for help.