Teacher’s Day a.k.a Hari Guru

yayayaya… happy teacher’s day!! to all my beloved teacher.. hmm.. mmg best betul ahri ni.. cikgu sumer tak nasuk kelas.. bukan suka cikgu tak msuk kelas cuma happy tengok cikgu happy dan merehatkan diri dari segala masalah kelas… hari ni belajar kimia.. mmg best sangat..

cuma ada jugaklah segelintir pelajar yang tak masuk kelas.. takpelah.. tak kisah pun.. cikgu memang berjasa.. siapalah kita hari ini kalau bukan cikgu yang mendidik kita untuk menjadi insan berguna kan kan kan ūüėÄ

nak cakap lama-lama kejap lagi ada kelas.. apapun selamat hari guru semua!

Selamat Hari Guru

Advertisements

Understanding the Mechanism of Blood Clotting

hey! it’s me again. ūüėÄ Form5 Biology Chapter 1 . Check this out!

NECESSITY FOR BLOOD CLOTTING

  • Prevent excessive blood loss from the body when there is a damage of the blood vessel.
  • Maintain the blood pressure.
  • Prevent the entry of microorganism and foreign particles into the body.
  • Promote wound healing
BLOOD CLOTTING MECHANISM
  • When you get cut, platelets exposed to air and become sticky then clump together to plug the wound.
  • Clotting factors are released by platelets and damage tissue called thrombokinase.
  • Thrombokinase in the presence of calcium ions, converts prothrombin into thrombin
  • The formation of prothrombin in the livers requires vitamin K
  • Thrombin converts soluble plasma protein, fibrinogen into insoluble fibrin fibres which form a meshwork of thread over the wound.
  • As the blood flows, erythrocytes and platelets are trapped in the fibrin fibres and a blood clot are form.
CONSEQUENCES OF AN IMPAIRED BLOOD CLOTTING MECHANISM

PROBLEMS RELATED TO BLOOD CLOTTING INCLUDE HAEMOPHILIA AND THROMBOSIS 
HAEMOPHILIA
  • Haemophilia is a heritance disease due to the lack of certain gene for the production of certain factors.
  • This is an impaired clotting mechanism which causes serious bleeding¬†particularly¬†in the joints
  • The afflicted person may die as the result of excessive bleeding from even minor cuts and bruises because blood clotting cannot take place.
THROMBOSIS
  • Sometimes a local blood clot(thrombus) is formed on the damaged rough inner wall of the artery.
  • This may cause blockage of the artery known as thrombosis.
  • Embolus formed when the thrombus dislodges and is carried away by blood circulation.
  • It may trapped in a small artery where it blocked the blood flow, this condition called embolism.
  • The blocked coronary artery cuts off the supply of oxygen and nutrients to the heart muscles, hence causes the heart attack.
here are the link about the blood clotting :¬†http://www.youtube.com/watch?v=–bZUeb83uU&feature=related
erythrocytes trapped by fibrin
stages in blood clotting

Lymphatic System

here’s Biology Form 5 chapter 1 Transport ūüôā ¬†anything problem you could comment me ūüôā

FORMATION OF THE INTERSTITIAL FLUID

  • When blood flows from the arteries into the capillaries, there is higher hydrostatic pressure at the arterial end of the capillaries.
  • Some fluid forces out due to the high pressure through capillaries wall into the intercellular spaces.
  • When the fluid out, the fluid called interstitial fluid or tissue fluid.
  • This fluid is similar to blood plasma but it does not have erythrocytes , platelets and large protein molecules.
IMPORTANCE OF THE INTERSTITIAL FLUID
  • It bathes the cells
  • Supply the cells requirements
  • Oxygen & nutrients diffuse from blood through the interstitial fluid and cells
  • Excretory products such as carbon dioxide and urea diffuse out
  • The internal¬†environment¬†is kept within the range by¬†homeostatic¬†processes.
FATE OF THE INTERSTITIAL FLUID
  • 90% of the fluid flows back to the¬†venous¬†where the hydrostatic pressure is low.
  • 10% enters the lymphatic capillaries and called lymph
  • If the excess fluid unable to return back to the blood capillaries, it will cause tissue swelling and this condition called oedema.
STRUCTURE OF THE LYMPHATIC SYSTEM
  • Lymph is the colourless fluid in the lymphatic vessel.
  • it contain a higher number of lymphocytes than blood.
  • it also travel through the lymphatic vessels by the contraction of the surrounding skeletal muscle.
  • Flows in one direction, one end of the vessel is closed and back flow is prevented by valves present in the larger vessel.
  • the center for lymphatic system named thoracic duct¬†; the largest lymphatic vessel in the body
  • it carries lymph to the left subclavian ¬†vein back to the bloodstream
  • the right lymphatic duct transport lymph from the right side of the head and chest into the right subclavian vein.
  • Lymph node mainly found at the neck, armpits and groin.
ROLE OF THE LYMPHATIC SYSTEM
  • Collect¬†interstitial¬†fluid and returns it to the circulatory system.
  • Lacteal; lymphatic capillaries in the villi of the ileum absorbs fats and fat-soluble vitamins hence transport them to the blood circulatory system
  • Lymph nodes filter out bacteria & other foreign particles
  • Lymphocytes produce antibodies which aid in the destruction of¬†pathogens¬†and¬†neutralization¬†of toxin
lymphatic system

 formation of interstitial fluid and lymph

tanya khabar jer

assalamualaikum dan salam sejahtera,

hm.. amacam raya korang.. Luna baru balik dari kampung.. ni Luna nak cakap sikit pasal raya ni..

memandangkan raya dah menjelma.. maka. syaitan2 pun da terlepas la jugak.. jadi ada sedikit nasihat ni.. jangan nak berbalik kepada perangai asal sebelum puasa tau. ingat jangan nak tambah dosa lak.

sebenanyer nak cite tentang perjalanan balik umah.. alkisah nya begini.. pagi tadi punyalah kalut malut nak bersiap baju terus letak kat dalam kenderaan.. pastu terus bertolak.. masa memula happy la.. nak balik umah.. leh layan internet (kat umah nenek takder internet and komputer T.T) tetiber tengah jalan ibu ada cakap barang tu tertinggal.. barang ni tertinggal.. punyalah mengamuk ibu.. haishh…

memang trend keluarga Luna kalau pergi melancong.. wajib ada barang tertinggal… tengah jalan lak.. kiteowang singgah kat Muzium Arkeologi Lenggong.. best kat situ.. nampak perak-man.. huhuhu.. tak seram pun.. tapi best la. leh tau serba sedikit sejarah.. pas amik gambar.. kteowang pn teruskan perjalanan..

tangah jalan ayah tanya ” Broadband ada? dah simpan? dok kat ner?” Luna cakap ada.. pastu tanya abang.. abang kata tak der.. masa tu patah hati.. sedih!!!! balik2.. cakap kat ibu.. Luna pikir ibu mesti ngamok lagi tapi. ibu steady je.. ibu wat senyap.. ehh.. tau tau ada kat situ… yay!! boleh akses internet.. so moral of the story..

– jangan menyusahkan ibubapa.. barang kita.. kita jaga ngan leklok

– lao habit tu pelik n mmbebankan.. cuba ubah..

– ada masa jengoklah muzium biar reti skt sejarah n asal usul…

hanya suka2.. lao rajin komen ya.. ^^

Selamat Hari Raya

kyaah!!!! -^o^’

selamat hari raya saya ucapkan.. agaknyer lama juga saya tak post di blog ni. hm.. sibuklah sejak kebelakangan nih.. tapi takper.. saya disini untuk mengucapkan selamat hari raya kepada semua rakan-rakan, guru-guru dan semua yang mengenali diri ini.. hmm.. bila boleh balik kampung ya?? (ibu:arini siap-siap cepat) yay.. balik kampung!!!

kepada semua yang ingin pulang beraya di kampung.. hanya satu pesanan saya.. bawaklah kereta bebaik.. ingat orang yang tersayang.. patuhi papan tanda… ingat biar lambat asal selamat..

ampun dan maaf andai kata

terkasar bahasa

tersilap bicara

termarah tak kena

tertanya tak tentu hala

tersasul tak sengaja

terpukul kat mana-mana

terpekik kat telinga

tersekeh dikepala

terpinjam harta benda

termoody tak semena-mena

terskodeng tetiba

termacam-macam lagi lah yang tak kena

semoga dimaafkan yerp -^_^’

-selamat hari raya maaf zahir dan batin-

selamat hari kebangsaan

MERDEKA!!!!

ya sekarang kita sudah menghampiri hari kebangsaan tinggal 4 hari jerp gie.. malangnyer bila bulan kemerdekaan kita dicemari dengan adegan rusuhan di kedutaan Malaysia di Indonesia.. mereka sanggup membakar JALUR GEMILANG dan memijaknyer.. masa tuh hanya tuhan saja yang tahu betapa tersiksa dan marahnya batinku..

   sungguh.. saya tak dapat berbuat apa-apa.. tetapi.. mahukah maruah kita tercemar? mengapa bulan kemerdekaan tahun ini begitu hambar?? tidak seperti tahun-tahun lalu?? mungkin kita ada jawapannya.

   apapun.. selamat menyambut kemerdekaan. semoga kita akan lebih menghayati dan fikir semula pengorbanan insan-insan yang berjuang demi sebuah kemerdekaan. masihkah kita ingat siapakah pejuang yang bermati-matian demi kemerdekaan. terlalu teruk jika kita tidak mengenali mereka.

¬†¬† –SELAMAT HARI KEBANGSAAN

peace no war!! ^^v