|
JOHN HAROLD RIVERA,MARK ANTHONY QUIERRA,IVY RODRIGUEZ,RAYMUND JAY RUIZ,DONIDICK QUILBIO
Sunday, 11 October 2015
PANG-URI
REPRODUCTIVE SYSTEM
Reproductive
System is illustrated to the right. Sperm are produced in the testes located in thescrotum. Normal body temperature is too hot thus is lethal to sperm so the testes are outside of the abdominal cavity where the temperature is about 2° C (3.6° F) lower. Note also that a woman’s body temperature is lowest around the time of ovulation to help insure sperm live longer to reach the egg. If a man takes too many long, very hot baths, this can reduce his sperm count. Undescended testes (testes are supposed to descend before birth) will cause sterility because their environment is too warm for sperm viability unless the problem can be surgically corrected. (Undescended testes are also very prone to developing cancer, thus if they cannot be surgically moved, they probably will need to be removed.)
THE FEMALE REPRODUCTIVE SYSTEM
The female reproductive system is illustrated to the right. “Eggs” are produced in the ovaries, but remember from our discussion of meiosis, that these are not true eggs, yet, and will never complete meiosis and become such unless/until first fertilized by a sperm. Within the ovary, a follicle consists of one precursor egg cell surrounded by special cells to nourish and protect it. A human female typically has about 400,000 follicles/potential eggs, all formed before birth. Only several hundred of these “eggs” will actually ever be released during her reproductive years. (As just an example, if a woman would ovulate from age 15 to age 55, which is a long time, that’s 40 years. If we’d assume 13 28-day cycles per year, that would be 40 × 13 = 520 potential times an “egg” could be released.) Normally, in humans, after the onset of puberty, due to the stimulation of follicle-stimulating hormone (FSH) one “egg” per cycle matures and is released from its ovary. Ovulation is the release of a mature “egg” due to the stimulation ofleutenizing hormone (LH), which then stimulates the remaining follicle cells to turn into a corpus luteumwhich then secretes progesterone to prepare the uterus for possible implantation. If an egg is not fertilized and does not implant, the corpus luteum disintegrates and when it stops producing progesterone, the lining of the uterus breaks down and is shed.
Thursday, 8 October 2015
HOW TO CREATE A PUPPET?
Are you in desperate need of some good old-fashioned quality time with your kids? There's nothing more bonding than sitting down at your kitchen table and letting those creative juices flow with glue, glitter and googly eyes. To make this special moment last a little longer, why not try making these fantastic puppets which will transport you from the mess and goo of the craft table to 'lights, camera, puppet show'!
Enjoy some one-on-one kid time with these 5 fun puppet ideas:
1) Rubber glove finger puppets
Use up those old rubber gloves with this quirky family of finger puppets. Raid your craft drawer and grab some sequins, wool, googly eyes (and whatever else you have lying around) and cut off the fingers of your rubber gloves. Then the kids can go wild decorating the fingers with nothing but their imagination and a few dabs of glue.
2) Paddle pop stick puppets
It's easier than you think to create your own quality paddle pop puppets. All you need is some craft foam, a bunch of paddle pop sticks (of course) and some sparkly decorations, cut out the shapes you need for each puppet, stick them together and the characters are ready for action.
3) Sock puppets
These puppets are a great way to use up those lonely old socks who have lost their matching pair. Just grab the poor darling and sew on a couple of buttons for eyes, use some old wool to make a head-full of hair and you are ready to start the show. Your kids will love watching a sad old sock transform into a crazy character of their very own.
4) Animal felt puppets from Designs
How cute are these finger puppets! To make your own bunch of farmyard friends just grab a variety of coloured felt, cut out the shapes, stick them together and make the eyes by sewing on some little beads. Pop a puppet on each finger and you've got yourself a barnyard full of fun.
5) Finger puppet templates
Use these handy finger puppet templates to make story book characters come alive. Have some swashbuckling fun with the cheeky pirate, flutter through a field of flowers with a beautiful fairy or join a jungle full of animals on a daring adventure. Just print out your child's favourite pattern and start creating today!
Subscribe to:
Posts (Atom)